US2703071A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Pressure operated device
Assignee: Individual
•
Filing: 1943-01-19
•
Granted: 1955-03-01
•
Expires: 1963-01-19
Abstract
No abstract record available.
Inventors
- 👤 Francis C South
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 21:44
CPC Classifications
F; F42; F42C; F42C15/00; F42C15/24; F42C15/26; F42C15/32; F42C19/00; F42C19/06; Y; Y10; Y10T; Y10T137/00; Y10T137/0971; Y10T137/0989
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2065972A
Cited
US1120772A
Cited
US1184222A
Cited
FR530834A
Cited
FR602624A
Cited
US2073163A
Cited
US2163731A
Cited
US2092417A
Cited
US2223097A
Cited
US2197473A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1958-02-28 | 1958-08-30 | 1959-03-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1962-02-28 | 1962-08-30 | 1963-03-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1966-02-28 | 1966-08-30 | 1967-03-01 | $7700.00 | Window Closed / Lapsed |