Patent US4734323A successfully refreshed from Google Patents.
Patent US2797269A successfully refreshed from Google Patents.
US2797269A
Expired / Lapsed
US
⏱️ 0.0 years remaining
buck ctal
Assignee: —
•
Filing: —
•
Granted: 1957-06-25
•
Expires: 1974-06-25
Abstract
No abstract record available.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 19:49
CPC Classifications
F; F02; F02P; F02P5/00; F02P5/04; F02P5/05; F02P5/10; F02P5/103
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1981042A
Cited
US2303464A
Cited
US2594447A
Cited
US2640891A
Cited
GB190319015A
Cited
US2048860A
Cited
US2238383A
Cited
US2503082A
Cited
GB622018A
Cited
US2644867A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1960-06-24 | 1960-12-24 | 1961-06-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-06-24 | 1964-12-24 | 1965-06-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-06-24 | 1968-12-24 | 1969-06-25 | $7700.00 | Window Closed / Lapsed |