US2960825A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Reexpansion gas turbine engine with differential compressor drive
Assignee: Northrop Grumman Space and Mission Systems Corp
•
Filing: 1955-10-19
•
Granted: 1960-11-22
•
Expires: 1975-10-19
Abstract
No abstract record available.
Inventors
- 👤 Achilles C Sampietro
- 👤 John P Heiss
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 23:06
CPC Classifications
F; F02; F02C; F02C7/00; F02C7/08; F02C7/10; F02C7/105; F02C7/12; F02C7/14; F02C7/141; F02C7/143; F02C7/36; Y; Y10; Y10S; Y10S74/00; Y10S74/05
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US2318905A
Cited
US2322717A
Cited
US2362714A
Cited
US2408080A
Cited
GB595357A
Cited
DE868809C
Cited
US2497338A
Cited
US2626502A
Cited
US2624172A
Cited
US2625012A
Cited
US2693080A
Cited
US2807138A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-11-22 | 1964-05-23 | 1964-11-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-11-22 | 1968-05-23 | 1968-11-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-11-22 | 1972-05-23 | 1972-11-22 | $7700.00 | Window Closed / Lapsed |