US2487653A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Helicopter drive with resilient transmission element
Assignee: RTX Corp
•
Filing: 1946-05-03
•
Granted: 1949-11-08
•
Expires: 1966-05-03
Abstract
No abstract record available.
Inventors
- 👤 Heintze Carl Paul
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 04:14
CPC Classifications
B; B64; B64C; B64C27/00; B64C27/001; Y; Y10; Y10S; Y10S416/00; Y10S416/50; Y10T; Y10T403/00; Y10T403/45; Y10T403/455
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US758457A
Cited
US1229417A
Cited
US1795816A
Cited
US1822026A
Cited
US2202615A
Cited
US2339877A
Cited
US2261954A
Cited
US2366236A
Cited
US2351427A
Cited
US2395143A
Cited
US2420452A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1952-11-07 | 1953-05-09 | 1953-11-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1956-11-07 | 1957-05-09 | 1957-11-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1960-11-07 | 1961-05-09 | 1961-11-08 | $7700.00 | Window Closed / Lapsed |