US2863446A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Pressure regulator device for respirators
Assignee: CONITECH Ltd
•
Filing: 1953-07-08
•
Granted: 1958-12-09
•
Expires: 1973-07-08
Abstract
No abstract record available.
Inventors
- 👤 Iii Thomas C Huxley
- 👤 Nelson G Kling
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 12:19
CPC Classifications
A; A61; A61H; A61H31/00; A61H31/02; A61M; A61M16/00; A61M16/0003; A61M16/0009; Y; Y10; Y10S; Y10S137/00; Y10S137/908; Y10T; Y10T137/00; Y10T137/7722; Y10T137/7781; Y10T137/7832; Y10T137/7835; Y10T137/7836
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2313149A
Cited
US1022407A
Cited
US1518984A
Cited
US1697865A
Cited
US2490395A
Cited
US2700488A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-12-08 | 1962-06-09 | 1962-12-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-12-08 | 1966-06-09 | 1966-12-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-12-08 | 1970-06-09 | 1970-12-09 | $7700.00 | Window Closed / Lapsed |