US2670912A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Means for preventing the formation of ice on an aircraft or in a gas turbine engine therefor
Assignee: Armstrong Siddeley Motors Ltd
•
Filing: 1951-02-27
•
Granted: 1954-03-02
•
Expires: 1971-02-27
Abstract
No abstract record available.
Inventors
- 👤 William H Lindsey
- 👤 Leslie R Fellows
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 07:20
CPC Classifications
F; F02; F02C; F02C7/00; F02C7/04; F02C7/047; B; B64; B64D; B64D15/00; B64D15/16; Y; Y10; Y10S; Y10S261/00; Y10S261/20
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
CA468294A
Cited
US2182530A
Cited
US2338574A
Cited
US2541512A
Cited
US2469375A
Cited
GB618224A
Cited
US2563054A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1957-03-01 | 1957-08-31 | 1958-03-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-03-01 | 1961-08-31 | 1962-03-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-03-01 | 1965-08-31 | 1966-03-02 | $7700.00 | Window Closed / Lapsed |