US1962987A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Cylinder head for internal combustion engines
Assignee: Bristol Aeroplane Co Ltd
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Filing: 1931-08-28
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Granted: 1934-06-12
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Expires: 1951-08-28
Abstract
No abstract record available.
Inventors
- 👤 Fedden Alfred Hubert Roy
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 16:16
CPC Classifications
F; F02; F02F; F02F1/00; F02F1/24; F02F1/26; F02F1/28; F02F1/30
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) | 1937-06-11 | 1937-12-11 | 1938-06-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1941-06-11 | 1941-12-11 | 1942-06-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1945-06-11 | 1945-12-11 | 1946-06-12 | $7700.00 | Window Closed / Lapsed |