US2660858A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Air-cooling gas turbine blade
Assignee: ExxonMobil Oil Corp
•
Filing: 1948-05-03
•
Granted: 1953-12-01
•
Expires: 1968-05-03
Abstract
No abstract record available.
Inventors
- 👤 Lester C Lichty
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 21:09
CPC Classifications
F; F02; F02C; F02C7/00; F02C7/12; F02C7/125; Y; Y02; Y02T; Y02T50/00; Y02T50/60
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US926157A
Cited
FR346611A
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US919895A
Cited
FR371230A
Cited
US1375931A
Cited
US1421087A
Cited
US1741957A
Cited
FR641739A
Cited
GB484289A
Cited
US2405919A
Cited
US2489683A
Cited
US2536062A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1956-11-30 | 1957-06-01 | 1957-12-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-11-30 | 1961-06-01 | 1961-12-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-11-30 | 1965-06-01 | 1965-12-01 | $7700.00 | Window Closed / Lapsed |