Canadian Patents Database / Patent 3026541 Summary

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(12) Patent Application: (11) CA 3026541
(54) English Title: MICROWAVE COFFEE-MAKER
(54) French Title: CAFETIERE POUR FOUR A MICRO-ONDES
(51) International Patent Classification (IPC):
  • A47J 31/02 (2006.01)
  • A47J 31/18 (2006.01)
(72) Inventors :
  • SWARTZ, GARY I (Canada)
(73) Owners :
  • SWARTZ, GARY I (Canada)
(71) Applicants :
  • SWARTZ, GARY I (Canada)
(74) Agent: LOVELAND, DAMIEN G.
(45) Issued:
(22) Filed Date: 2018-12-05
(41) Open to Public Inspection: 2019-07-09
Examination requested: 2018-12-05
(30) Availability of licence: N/A
(30) Language of filing: English

English Abstract


A coffee-maker that is used to make coffee in a microwave oven that consists
of: a cup-like clear
plastic vessel having a flat bottom-wall with a round hole in its centre into
which is inserted a
downward facing food safe silicon umbrella valve plus 2 ¨ 4 expression vent
holes covered by
the umbrella valve; a side-wall extending vertically from the bottom-wall with
threads for a lid; a
plastic inverted-U shaped lid with an air-tight food safe silicon gasket
around its interior edge
and shaped to press air-tight against the lip of the vessel with threads to
allow the lid to be
screwed tightly onto the vessel, and with a round hole in the center of the
lid into which is
inserted an upward facing food safe umbrella valve with a pressure release
handle plus 1 or more
pressure release vent holes covered by the umbrella valve; and a plastic and
nylon mesh filter
basket with a small flange on its bottom exterior to be inserted into the
vessel and sit on the
bottom-wall to create a shallow cavity above the bottom-wall umbrella valve
and below the
basket, and a larger cavity above the basket, into which are put ground coffee
and water. A
flange extends from the exterior bottom-wall of the vessel with a lesser
diameter than the vessel
to enable the coffee-maker to sit securely in a cup or mug.
In order to make coffee, the coffee-maker sits on and slightly into a typical
coffee cup or mug. A
nylon mesh filter-basket, ground coffee and a cup of water are put into the
filter-basket and the
lid is screwed on tight to create an air-tight seal between the lid and the
vessel. Both umbrella
valves also make the vessel air-tight. As result, no water can escape from the
vessel prior to the
opening of the lower umbrella valve. Next the coffee-maker and cup are put
into a microwave
oven. The device and contents are heated in the microwave oven at the high
setting for the length
of time the microwave oven requires to boil a cup of water (approximately two
to two and a half
minutes) plus 5- 10 seconds. When the water in the vessel boils, the steam
created generates the
pressure required to open the lower umbrella valve and the hot coffee infusion
(freshly brewed
coffee) is rapidly expressed through the expression vent holes. The nylon mesh
prevents
contamination of the coffee infusion with coffee grinds. If the lower umbrella
valve fails to open,
the upper umbrella valve opens to relieve the steam pressure in the vessel
while the screwed on
lid is designed to resist the pressure. After the coffee has been made and the
device removed
from the microwave oven and begins to cool, the interior of the coffee-maker
contains a partial
vacuum and the upper umbrella valve has a small handle to enable it to be
opened manually to
allow air to enter the coffee-maker to equalize the pressure in order to
easily remove the lid. It
should be noted the device does not require metal or bi-metal parts, melting
parts or essentially
moving parts such as are typical with other patented or patent applied for
microwave coffee-
makers.


Note: Claims are shown in the official language in which they were submitted.

1
Claims
I claim:
1. A clear plastic coffee-maker that sits on and partially within a typical
coffee mug or cup
comprising: a vessel having a bottom-wall, a side-wall extending upwardly from
said bottom-
wall to form a container cavity; a plastic and nylon mesh filter basket that
forms a small cavity
below it and a larger cavity above it; and a lid with a gasket and threads;
said bottom-wall
including 2 ¨ 4 expression vent holes and an umbrella valve that covers the
holes, said umbrella
valve manufactured to immediately open under the pressure of steam generated
by water in the
vessel just brought to the boil and that by opening enables an infusion of
hot, freshly brewed
coffee to be expressed from said container cavities; said lid with a gasket
that when screwed onto
the vessel forms a locked, airtight seal over the top of said container
cavities, said seal to provide
greater resistance to the steam pressure generated by boiling water than an
umbrella valve; said
lid including 1 or more pressure release vent holes and an umbrella valve that
covers the holes
manufactured to open at slightly more pressure than the lower umbrella valve
should the lower
umbrella valve fail to open.
2. The coffee-maker as designed in claim 1 is equal to or larger in exterior
diameter than the
coffee cup upon which it will sit to prevent the bulk of the vessel from
entering the coffee cup.
3. The coffee-maker as designed in claim 1 has a flange extending downward
from the exterior
bottom wall that is smaller in diameter than the exterior diameter of the main
vessel and smaller
in diameter than the interior diameter of a typical coffee cup or mug, so that
the coffee-maker
can snugly sit on and partially within a typical coffee cup.
4. The coffee-maker as designed in claim 1 has one or more grooves engraved in
the outside
bottom edge to allow air inside the coffee cup to freely escape from the
coffee cup.
5. The coffee-maker as designed in claims 1 and 4 with the lid in position to
create an airtight
seal is so designed as to retain water for sufficient time for it to be heated
to the boil point in
order to form a typical infusion with ground coffee, and at the boiling point
for the lower
umbrella valve to open and for the infusion of coffee to express rapidly
through the expression
vent holes into a coffee cup or mug.
6. The side-wall as designed in claim 1 has at its exterior top threads to
accommodate a screw on
lid.
7. The screw on lid as designed in claim 5 has a top-wall with a food safe
gasket on the interior
and a side-wall that extends downward, has a very slightly larger inside
diameter than the outside
diameter of the main vessel threads and has its own threads that allow it to
be screwed tightly
onto the exterior side-wall of the vessel in order to press the gasket tightly
against the rim of the
vessel in order to form an airtight barrier requiring significant steam
pressure to break the air-
tight seal. There is an umbrella valve in the center of the lid with a
pressure release handle and
with 1 or more pressure release vent holes that releases under less steam
pressure than would be
required to break the gasket seal and more steam pressure than is required to
open the lower
umbrella valve.

2
8. The vent holes as designed in claim 1 and 7 are dispersed to evenly
distribute pressure against
the concave flexible flaps of the umbrella valve.
9. The coffee-maker as designed in claim 1 with the lid in position to create
an airtight seal is so
designed as to retain water for sufficient time for it to be heated to the
boil point in order to form
a typical infusion with ground coffee, and at the boiling point for the lower
umbrella valve to
open and for the infusion of coffee to express through the expression vent
holes.
10. The umbrella valves as designed in claim 1 are food-safe and intended to
be replaceable.
11. The plastic nylon mesh filter basket designed in claim 1 has downward
facing flange on the
interior of the bottom-wall to create a cavity above the umbrella vent and
expression vent holes
so as to not block the holes.
12. The nylon mesh designed in claim 11 is sufficiently fine to prevent coffee
grinds from
passing though it thereby contaminating the freshly brewed coffee.
13. The nylon mesh designed in claim 11 is strong enough when sufficiently
supported by the
plastic basket so as not to lose its shape or integrity in boiling water.
14. The plastic nylon mesh filter basket designed in claim 1 allows a
sufficient volume of boiling
water to pass through the ground coffee to create an acceptable coffee
infusion before being
expressed out of the expression vent holes.
15. The expression vent holes designed in claim 1 are intended to enable the
vessel to express the
coffee infusion as rapidly as possible to limit the time the coffee grinds are
exposed to boiling
water.

Note: Descriptions are shown in the official language in which they were submitted.

1
Background of the Invention
Easily-made, single-portion, freshly brewed coffee is very popular. Typical
devices use
disposable pods which have a negative environmental impact (metal). Individual
servings are
relatively expensive as they require a sophisticated manufacturing process
beyond simply
grinding coffee beans. The devices are not particularly mobile. The devices
themselves are
relatively expensive. The blends of coffee available in pods are restricted to
those manufacturers
choose to offer. There are multiple pod standards. There is limited
flexibility as to the strength of
the coffee made.
In view of the current state of the art, there is a need for a device that can
quickly, conveniently
and inexpensively brew a single cup of coffee; that allows flexibility as to
the strength of the
coffee; that can use any blend of coffee beans or ground coffee; and that is
inexpensive to
acquire.
Summary of the Invention
The present invention is directed to a quick and convenient method and device
to freshly brew
coffee in a microwave oven.
Description of the Invention
In one non-limiting aspect of the present invention, there is provided a clear
plastic microwave
coffee-maker that includes a round container vessel (1) having a bottom-wall
with a downward
facing exterior flange (11), a side-wall that extends upwardly from the bottom-
wall to form a
container cavity with threads around the lip (9); a nylon mesh filter basket
(5) with a flange (13);
and a screw on lid (2) with a gasket (12) and threads on the interior side
wall (10). The bottom-
wall includes a food safe umbrella valve (4) plus 2 ¨4 expression vent holes
(8) covered by the
umbrella valve to enable a hot coffee infusion to be expressed from the
container cavity. The lid
is designed to create an air-tight seal with a food safe gasket around the
interior diameter and has
a food safe umbrella valve (3) with a pressure release handle (14) plus 1 or
more pressure release
vent holes (7) covered by the umbrella valve to allow for pressure release if
the lower umbrella
valve fails to open. The umbrella valves have concave flexible flaps (16) that
become convex
under sufficient steam pressure to allow venting. The nylon mesh filter basket
is immersed in
water and contains ground coffee. The nylon mesh (6) is sufficiently fine to
prevent ground
coffee granules from expressing out of the vessel expression vent holes and
contaminating the
freshly brewed coffee. There are one or more grooves (15) on outside bottom of
the coffee-
maker to allow air to easily vent from the cup being filled with coffee. The
vessel is made of
clear plastic to visually monitor boiling and venting.
In another and/or alternative aspect of the present invention, the coffee-
maker could be made of
coloured plastic, ceramic pottery, glass or similar non-metallic material.
Said aspect would
require a method to maintain the airtight seal other than threads such as
making the lid heavy
enough to resist the steam pressure generated in the coffee-maker or clamps to
hold the lid tight
against the lip. Visual monitoring might not be possible.
In another aspect of the invention the umbrella valves are made of food safe
rubber or similar
material in place of silicon.
CA 3026541 2018-12-05

2
In another aspect of the invention the lower umbrella valve could be a
duckbill or similar
pressure operated one-way valve.
In another aspect of the invention the lid is made entirely of food-safe
rubber or silicon or similar
material with an umbrella release valve that would release at a higher
pressure than the bottom
valve and designed to wrap around a lid similar to the lid on some travel
mugs. The vessel would
require an exterior facing lip for the lid to wrap around. Said lid would be
ideal for a ceramic
vessel.
In another aspect the present invention it could be used to brew tea or an
herbal infusion.
In another aspect, milk could be used instead of water.
In another aspect of the invention milk and sugar could be added to the water.
In another aspect of the present invention there are small handles on the lid
and/or vessel.
In another aspect of the invention it uses a disposable paper filter and would
include a plastic or
ceramic device to help retain the integrity and shape of the paper filter in
boiling water.
In another aspect of the invention it can use more or less than a cup of
water.
These and other objects of the present invention will become readily apparent
upon further
review of the following claims and drawings.
Citations
US4577080A - Coffee maker adapted for use in a microwave oven
US8485089B2 - Microwave coffee maker
US5095185A - Microwave coffee maker
CA 3026541 2018-12-05

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Admin Status

Title Date
Forecasted Issue Date Unavailable
(22) Filed 2018-12-05
Examination Requested 2018-12-05
(41) Open to Public Inspection 2019-07-09

Maintenance Fee

Description Date Amount
Next Payment if small entity fee 2020-12-07 $50.00
Next Payment if standard fee 2020-12-07 $100.00

Note : If the full payment has not been received on or before the date indicated, a further fee may be required which may be one of the following

  • the reinstatement fee set out in Item 7 of Schedule II of the Patent Rules;
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Payment History

Fee Type Anniversary Year Due Date Amount Paid Paid Date
Request for Examination $400.00 2018-12-05
Filing $200.00 2018-12-05
Current owners on record shown in alphabetical order.
Current Owners on Record
SWARTZ, GARY I
Past owners on record shown in alphabetical order.
Past Owners on Record
None
Past Owners that do not appear in the "Owners on Record" listing will appear in other documentation within the application.

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Document
Description
Date
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Number of pages Size of Image (KB)
Abstract 2018-12-05 1 70
Description 2018-12-05 2 95
Claims 2018-12-05 2 98
Drawings 2018-12-05 2 32
Amendment / Special Order 2019-05-06 3 129
Early Lay-Open Request 2019-05-06 3 129
Office Letter 2019-05-14 1 46
Cover Page 2019-06-03 1 63
Change of Agent 2019-06-14 8 182
Amendment 2019-06-14 23 667
Special Order - Green Granted 2019-07-09 1 51
Office Letter 2019-07-10 1 24
Amendment 2019-07-22 2 67
Change of Agent 2019-07-22 2 67
Office Letter 2019-08-08 1 22
Office Letter 2019-08-08 1 23
Correspondence Related to Formalities 2019-08-14 2 71
Office Letter 2019-08-16 1 52
Amendment 2019-08-19 21 584
Description 2019-08-19 8 301
Claims 2019-08-19 5 122
Abstract 2019-08-19 1 18
Drawings 2019-08-19 1 11
R30(2) Examiner Requisition 2019-09-20 4 198
Amendment 2019-09-26 13 321
Claims 2019-09-26 5 129