You can search for a specific date or a range of dates in the following fields.
- Issue Date
- Filing Date
- Examination Request Date
- Open to Public Inspection Date
- Priority Date
- National Entry Date
Date searching is initiated by selecting one of the date fields from the pull down box:
Date searching is inactive when the pull down box contains the default text, "Date Search Not Active".
The "AND" operator links the date search criteria to your text search criteria.
The Boolean Text Search lets you enter text for up to three of the text fields and one of the date fields concurrently.
The Advanced Text Search lets you search text in all of the text fields and in one of the date fields concurrently.
Date searches should always be used in conjunction with a text search to avoid long search times.
This search finds patent documents that were open to public inspection on or after March 12, 1993 and on or before September 27, 1996, and which also match any other search criteria that you have entered.
This search finds patent documents that were filed on or after December 3, 1989 and on or before December 3, 1994, and which also match any other search criteria that you have entered.
- Date modified: 2019-04-17