Patent US2946340A successfully refreshed from Google Patents.
US2946340A
Expired / Lapsed
US
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Lung-controlled breathing valve
Assignee: Individual
•
Filing: 1956-06-29
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Granted: 1960-07-26
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Expires: 1976-06-29
Abstract
No abstract record available.
Inventors
- 👤 Hollman Franz
- 👤 Warncke Ernst
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 08:17
CPC Classifications
B; B63; B63C; B63C11/00; B63C11/02; B63C11/18; B63C11/22; B63C11/2227; A; A62; A62B; A62B9/00; A62B9/02; A62B9/022; Y; Y10; Y10S; Y10S137/00; Y10S137/908; Y10T; Y10T137/00; Y10T137/2496; Y10T137/2544; Y10T137/7722; Y10T137/7781; Y10T137/7782; Y10T137/8593; Y10T137/87153
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2168695A
Cited
FR1038345A
Cited
US2695609A
Cited
US2732840A
Cited
US2787280A
Cited
US2878807A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-07-26 | 1964-01-25 | 1964-07-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-07-26 | 1968-01-25 | 1968-07-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-07-26 | 1972-01-25 | 1972-07-26 | $7700.00 | Window Closed / Lapsed |