US2921431A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Engine turbosupercharger system
Assignee: Northrop Grumman Space and Mission Systems Corp
•
Filing: 1955-11-01
•
Granted: 1960-01-19
•
Expires: 1975-11-01
Abstract
No abstract record available.
Inventors
- 👤 Sampietro Achilles Charles
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 13:37
CPC Classifications
F; F02; F02B; F02B37/00; F02B37/12; F02B37/20; F02B37/04; F02B37/11; Y; Y02; Y02T; Y02T10/00; Y02T10/10; Y02T10/12
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US841972A
Cited
US1893127A
Cited
US2100092A
Cited
US2379455A
Cited
GB620376A
Cited
US2608051A
Cited
US2742758A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-01-18 | 1963-07-20 | 1964-01-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-01-18 | 1967-07-20 | 1968-01-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-01-18 | 1971-07-20 | 1972-01-19 | $7700.00 | Window Closed / Lapsed |