US2999631A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Dual airfoil
Assignee: General Electric Co
•
Filing: 1958-09-05
•
Granted: 1961-09-12
•
Expires: 1978-09-05
Abstract
No abstract record available.
Inventors
- 👤 Wollmershauser Charles
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 04:52
CPC Classifications
F; F01; F01D; F01D11/00; F01D11/005; F01D11/006; F01D11/008; F01D5/00; F01D5/02; F01D5/022; F01D5/12; F01D5/14; F01D5/141; F01D5/22; F01D5/225; F02; F02C; F02C3/00; F02C3/04; F02C3/06; F02C3/073; Y; Y02; Y02T; Y02T50/00; Y02T50/60; Y10; Y10S; Y10S416/00; Y10S416/50
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
AT51150B
Cited
FR411473A
Cited
US1554614A
Cited
US1999711A
Cited
US1999739A
Cited
US2333053A
Cited
US2405164A
Cited
US2411124A
Cited
GB586559A
Cited
US2336323A
Cited
US2398140A
Cited
US2391623A
Cited
US2647684A
Cited
US2668413A
Cited
US2646209A
Cited
US2660400A
Cited
GB662357A
Cited
US2772854A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-09-11 | 1965-03-13 | 1965-09-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-09-11 | 1969-03-13 | 1969-09-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-09-11 | 1973-03-13 | 1973-09-12 | $7700.00 | Window Closed / Lapsed |