US2771327A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Piston construction
Assignee: Northrop Grumman Space and Mission Systems Corp
•
Filing: 1953-08-17
•
Granted: 1956-11-20
•
Expires: 1973-08-17
Abstract
No abstract record available.
Inventors
- 👤 William C Reinberger
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 06:20
CPC Classifications
F; F02; F02F; F02F3/00; F02F3/02; F02F3/04; F02F3/08; F02F2200/00; F02F2200/04; F05; F05C; F05C2201/00; F05C2201/02; F05C2201/021; F05C2201/04; F05C2201/0433; F05C2201/0448; Y; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/49229; Y10T29/49249; Y10T29/49256
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1794767A
Cited
GB231047A
Cited
US1835863A
Cited
DE566738C
Cited
US1936598A
Cited
US1985699A
Cited
US1938826A
Cited
FR781384A
Cited
US2067314A
Cited
GB608142A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1959-11-20 | 1960-05-21 | 1960-11-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-11-20 | 1964-05-21 | 1964-11-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-11-20 | 1968-05-21 | 1968-11-20 | $7700.00 | Window Closed / Lapsed |