US2669837A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Means for synchronizing aircraft engines
Assignee: ZF International UK Ltd
•
Filing: 1950-09-18
•
Granted: 1954-02-23
•
Expires: 1970-09-18
Abstract
No abstract record available.
Inventors
- 👤 Harris Thomas Alfred
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 11:42
CPC Classifications
B; B64; B64D; B64D31/00; B64D31/02; B64D31/06; B64D31/12; F; F02; F02C; F02C9/00; F02C9/26; F02C9/42
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2095991A
Cited
US2086101A
Cited
US2103274A
Cited
GB578311A
Cited
US2381429A
Cited
US2381934A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1957-02-22 | 1957-08-24 | 1958-02-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-02-22 | 1961-08-24 | 1962-02-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-02-22 | 1965-08-24 | 1966-02-23 | $7700.00 | Window Closed / Lapsed |