US2852590A
Expired / Lapsed
US
⏱️ 0.0 years remaining
fremon
Assignee: —
•
Filing: —
•
Granted: 1958-09-16
•
Expires: 1975-09-16
Abstract
No abstract record available.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 06:10
CPC Classifications
F; F02; F02P; F02P7/00; F02P7/06; F02P7/073
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2169818A
Cited
US2446671A
Cited
US2474550A
Cited
US1873175A
Cited
US1941342A
Cited
US2084267A
Cited
US2401563A
Cited
US2248574A
Cited
US2427407A
Cited
US2522389A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-09-15 | 1962-03-17 | 1962-09-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-09-15 | 1966-03-17 | 1966-09-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-09-15 | 1970-03-17 | 1970-09-16 | $7700.00 | Window Closed / Lapsed |