US2653671A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Pitch lock
Assignee: RTX Corp
•
Filing: 1949-11-23
•
Granted: 1953-09-29
•
Expires: 1969-11-23
Abstract
No abstract record available.
Inventors
- 👤 Martin Erle
- 👤 Thomas B Rhines
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 11:41
CPC Classifications
B; B64; B64C; B64C11/00; B64C11/30; B64C11/32; B64C11/325
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1661632A
Cited
US1962459A
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US2156102A
Cited
GB496022A
Cited
GB497999A
Cited
US2343416A
Cited
US2320195A
Cited
US2276347A
Cited
US2370135A
Cited
GB562845A
Cited
US2370167A
Cited
US2462932A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1956-09-28 | 1957-03-30 | 1957-09-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-09-28 | 1961-03-30 | 1961-09-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-09-28 | 1965-03-30 | 1965-09-29 | $7700.00 | Window Closed / Lapsed |