Patent US2689682A successfully refreshed from Google Patents.
US2689682A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Gas turbine compressor
Assignee: AV Roe Canada Ltd
•
Filing: 1951-01-06
•
Granted: 1954-09-21
•
Expires: 1971-01-06
Abstract
No abstract record available.
Inventors
- 👤 Boyd Winnett
- 👤 Avery Burton Albert
- 👤 Laviolette Jean Paul
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 08:28
CPC Classifications
F; F01; F01D; F01D5/00; F01D5/02; F01D5/06; Y; Y02; Y02T; Y02T50/00; Y02T50/60
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US2452782A
Cited
US2434935A
Cited
US2497151A
Cited
US2553442A
Cited
US2575237A
Cited
US2548886A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1957-09-20 | 1958-03-22 | 1958-09-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-09-20 | 1962-03-22 | 1962-09-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-09-20 | 1966-03-22 | 1966-09-21 | $7700.00 | Window Closed / Lapsed |