US2813477A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Safety ventilator unit
Assignee: Individual
•
Filing: 1954-03-16
•
Granted: 1957-11-19
•
Expires: 1974-03-16
Abstract
No abstract record available.
Inventors
- 👤 Asa K Gaylord
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 23:10
CPC Classifications
F; F24; F24F; F24F13/00; F24F13/08; F24F13/10; F24F13/14; F24F13/1426; F24C; F24C15/00; F24C15/20; F24F13/1486; A; A62; A62C; A62C3/00; A62C3/006; F24F2013/146; F24F2013/1466; F24F2013/148
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1926433A
Cited
US2120490A
Cited
US2392038A
Cited
US2633929A
Cited
US2564074A
Cited
US2642152A
Cited
GB697328A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1960-11-18 | 1961-05-20 | 1961-11-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-11-18 | 1965-05-20 | 1965-11-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-11-18 | 1969-05-20 | 1969-11-19 | $7700.00 | Window Closed / Lapsed |