US3419031A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Breathing valve
Assignee: Individual
•
Filing: 1966-03-11
•
Granted: 1968-12-31
•
Expires: 1986-03-11
Abstract
No abstract record available.
Inventors
- 👤 Hesse Holger
- 👤 Hansen Frantz
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 17:07
CPC Classifications
A; A61; A61M; A61M16/00; A61M16/20; A61M16/208; F; F16; F16K; F16K15/00; F16K15/14; F16K15/144; Y; Y10; Y10T; Y10T137/00; Y10T137/2496; Y10T137/2544; Y10T137/7722; Y10T137/7837; Y10T137/7879; Y10T137/788; Y10T137/7882; Y10T137/7884
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1359631A
Cited
US1506012A
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FR861834A
Cited
US2640481A
Cited
US2941541A
Cited
US3242921A
Cited
US3084707A
Cited
GB990870A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1971-12-31 | 1972-07-01 | 1972-12-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-12-31 | 1976-07-01 | 1976-12-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-12-31 | 1980-07-01 | 1980-12-31 | $7700.00 | Window Closed / Lapsed |