US1688076A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Piston
Assignee: GRAYSON ENGINE Co Ltd
•
Filing: 1926-08-03
•
Granted: 1928-10-16
•
Expires: 1946-08-03
Abstract
No abstract record available.
Inventors
- 👤 Grayson George Wentworth
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 04:56
CPC Classifications
F; F02; F02B; F02B75/00; F02B75/28; F02B75/30
Claims Analysis
Total Claims: 0
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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) | 1931-10-16 | 1932-04-16 | 1932-10-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1935-10-16 | 1936-04-16 | 1936-10-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1939-10-16 | 1940-04-16 | 1940-10-16 | $7700.00 | Window Closed / Lapsed |