US3406682A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Respirator, narcosis apparatus or the like having a delayed release safety valve
Assignee: CARL GUNNAR DANIEL ENGSTROM
•
Filing: 1965-01-26
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Granted: 1968-10-22
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Expires: 1985-01-26
Abstract
No abstract record available.
Inventors
- 👤 Engstrom Carl-Gunnar Daniel
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 04:11
CPC Classifications
A; A61; A61M; A61M16/00; A61M16/20; A61M16/208; A61M16/209; A61M16/201; A61M16/206; Y; Y10; Y10T; Y10T137/00; Y10T137/2496; Y10T137/2559; Y10T137/265; Y10T137/2668; Y10T137/2693; Y10T137/8593; Y10T137/86389; Y10T137/86405; Y10T137/86413
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2770232A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1971-10-22 | 1972-04-22 | 1972-10-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-10-22 | 1976-04-22 | 1976-10-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-10-22 | 1980-04-22 | 1980-10-22 | $7700.00 | Window Closed / Lapsed |