Patent US2886971A successfully refreshed from Google Patents.
US2886971A
Expired / Lapsed
US
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Pressure gage valve for respirators
Assignee: CONITECH Ltd
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Filing: 1954-12-31
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Granted: 1959-05-19
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Expires: 1974-12-31
Abstract
No abstract record available.
Inventors
- 👤 Gorham George
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 03:30
CPC Classifications
A; A61; A61M; A61M16/00; A61M16/20
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US338711A
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US957347A
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US1015980A
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US1031109A
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US1879205A
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US2162242A
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US2408976A
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US2422796A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-05-18 | 1962-11-17 | 1963-05-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-05-18 | 1966-11-17 | 1967-05-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-05-18 | 1970-11-17 | 1971-05-19 | $7700.00 | Window Closed / Lapsed |