US1622965A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Cylinder for internal-combustion engines
Assignee: Napier Turbochargers Ltd
•
Filing: 1925-02-02
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Granted: 1927-03-29
•
Expires: 1945-02-02
Abstract
No abstract record available.
Inventors
- 👤 Napier Montague Stanley
- 👤 Wilkinson George Shakespeare
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 14:10
CPC Classifications
F; F02; F02F; F02F1/00; F02F1/02; F02F1/10; Y; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/49229; Y10T29/4927
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) | 1930-03-28 | 1930-09-27 | 1931-03-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1934-03-28 | 1934-09-27 | 1935-03-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1938-03-28 | 1938-09-27 | 1939-03-29 | $7700.00 | Window Closed / Lapsed |