US2928627A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Aircraft propulsion systems
Assignee: Lockheed Martin Corp
•
Filing: 1956-07-10
•
Granted: 1960-03-15
•
Expires: 1976-07-10
Abstract
No abstract record available.
Inventors
- 👤 Clarence L Johnson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 14:03
CPC Classifications
B; B64; B64D; B64D27/00; B64D27/02; B64D27/16; B64D27/18; B64C; B64C21/00; B64C21/02; B64C21/04; B64C23/00; B64C23/005; Y; Y02; Y02T; Y02T50/00; Y02T50/10
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2270920A
Cited
US2271321A
Cited
US2406916A
Cited
US2568813A
Cited
US2585676A
Cited
FR1107311A
Cited
FR1103426A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-03-15 | 1963-09-14 | 1964-03-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-03-15 | 1967-09-14 | 1968-03-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-03-15 | 1971-09-14 | 1972-03-15 | $7700.00 | Window Closed / Lapsed |