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US2764151A
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Underwater breathing apparatus
Assignee: Avox Systems Inc
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Filing: 1953-06-16
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Granted: 1956-09-25
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Expires: 1973-06-16
Abstract
No abstract record available.
Inventors
- 👤 Charles D Cupp
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 22:21
CPC Classifications
B; B63; B63C; B63C11/00; B63C11/02; B63C11/18; B63C11/22; B63C11/2236; Y; Y10; Y10S; Y10S224/00; Y10S224/934
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
DE649034C
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FR847195A
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US764709A
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US986907A
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US1926069A
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FR976590A
Cited
FR55480E
Cited
US2381568A
Cited
US2406888A
Cited
US2453475A
Cited
FR918008A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1959-09-25 | 1960-03-26 | 1960-09-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-09-25 | 1964-03-26 | 1964-09-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-09-25 | 1968-03-26 | 1968-09-25 | $7700.00 | Window Closed / Lapsed |