US1663298A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Rubber filter sheet
Assignee: Goodrich Corp
•
Filing: 1925-06-17
•
Granted: 1928-03-20
•
Expires: 1945-06-17
Abstract
No abstract record available.
Inventors
- 👤 William C Geer
- 👤 Charles F Sherwood
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 23:14
CPC Classifications
D; D21; D21F; D21F1/00; D21F1/0027; D21F1/0063; B; B01; B01D; B01D33/00; B01D33/06; B01D33/073; B01D33/09; B01D39/00; B01D39/14; B01D39/16; B01D39/1692; Y; Y10; Y10S; Y10S162/00; Y10S162/903
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1931-03-20 | 1931-09-19 | 1932-03-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1935-03-20 | 1935-09-19 | 1936-03-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1939-03-20 | 1939-09-19 | 1940-03-20 | $7700.00 | Window Closed / Lapsed |