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Patent US3050055A successfully refreshed from Google Patents.
US3050055A
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Underwater breathing device
Assignee: Individual
•
Filing: 1960-06-29
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Granted: 1962-08-21
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Expires: 1980-06-29
Abstract
No abstract record available.
Inventors
- 👤 Robert G Vautin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 14:26
CPC Classifications
B; B63; B63C; B63C11/00; B63C11/02; B63C11/18; B63C11/20; B63C11/202
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US667840A
Cited
US1901219A
Cited
FR1139978A
Cited
US2896616A
Cited
US2939457A
Cited
US2906263A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1965-08-20 | 1966-02-19 | 1966-08-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-08-20 | 1970-02-19 | 1970-08-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-08-20 | 1974-02-19 | 1974-08-21 | $7700.00 | Window Closed / Lapsed |