US2939457A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Breathing device
Assignee: Individual
•
Filing: 1958-06-19
•
Granted: 1960-06-07
•
Expires: 1978-06-19
Abstract
No abstract record available.
Inventors
- 👤 James P Fay
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 16:23
CPC Classifications
A; A62; A62B; A62B9/00; A62B9/02; A62B9/022; B; B63; B63C; B63C11/00; B63C11/02; B63C11/18; B63C11/22; B63C11/2209
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2757680A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-06-07 | 1963-12-07 | 1964-06-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-06-07 | 1967-12-07 | 1968-06-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-06-07 | 1971-12-07 | 1972-06-07 | $7700.00 | Window Closed / Lapsed |