Patent US540309A successfully refreshed from Google Patents.
US3045657A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Valve operating means
Assignee: Northrop Grumman Space and Mission Systems Corp
•
Filing: 1959-07-22
•
Granted: 1962-07-24
•
Expires: 1979-07-22
Abstract
No abstract record available.
Inventors
- 👤 Achilles C Sampietro
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 19:57
CPC Classifications
F; F01; F01L; F01L1/00; F01L1/20; F01L1/02; F01L1/04; F01L1/042; F01L1/12; F01L1/18; F01L1/181; F01L1/182; F01L1/183; F01L1/22; F01L1/24; F01L1/2405; F01L1/30; F01L1/32; F01L1/047; F01L1/053; F01L2001/0535; F01L2001/188
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US1188405A
Cited
US1239933A
Cited
AT85857B
Cited
US1633882A
Cited
US1699659A
Cited
US1866293A
Cited
US2338726A
Cited
GB674180A
Cited
US2757653A
Cited
US2871720A
Cited
US2813521A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1965-07-23 | 1966-01-22 | 1966-07-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-07-23 | 1970-01-22 | 1970-07-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-07-23 | 1974-01-22 | 1974-07-24 | $7700.00 | Window Closed / Lapsed |