US2758596A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Portable breathing apparatus of the demand type
Assignee: Avox Systems Inc
•
Filing: 1954-05-24
•
Granted: 1956-08-14
•
Expires: 1974-05-24
Abstract
No abstract record available.
Inventors
- 👤 Charles D Cupp
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 15:06
CPC Classifications
B; B63; B63C; B63C11/00; B63C11/02; B63C11/18; B63C11/22; B63C11/2236
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2473078A
Cited
US2597039A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1959-08-14 | 1960-02-13 | 1960-08-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-08-14 | 1964-02-13 | 1964-08-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-08-14 | 1968-02-13 | 1968-08-14 | $7700.00 | Window Closed / Lapsed |