US2643085A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Gas turbine apparatus
Assignee: Westinghouse Electric Corp
•
Filing: 1948-09-08
•
Granted: 1953-06-23
•
Expires: 1968-09-08
Abstract
No abstract record available.
Inventors
- 👤 William J Durkin
- 👤 Donald N Arvidson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 12:52
CPC Classifications
F; F01; F01D; F01D9/00; F01D9/02; F01D9/04; F01D9/042
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1369668A
Cited
US1288360A
Cited
US2445661A
Cited
US2397815A
Cited
US2425177A
Cited
US2488807A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1956-06-22 | 1956-12-22 | 1957-06-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-06-22 | 1960-12-22 | 1961-06-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-06-22 | 1964-12-22 | 1965-06-23 | $7700.00 | Window Closed / Lapsed |