Patent US2655175A successfully refreshed from Google Patents.
US2655175A
Expired / Lapsed
US
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Exhaust valve for gas masks
Assignee: Acme Protection Equipment Co
•
Filing: 1947-08-13
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Granted: 1953-10-13
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Expires: 1967-08-13
Abstract
No abstract record available.
Inventors
- 👤 Galen M Glidden
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 20:47
CPC Classifications
A; A62; A62B; A62B18/00; A62B18/08; A62B18/10; Y; Y10; Y10T; Y10T137/00; Y10T137/7722; Y10T137/7837; Y10T137/7879; Y10T137/7888; Y10T137/789
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
NL16917C
Cited
US797739A
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GB190521738A
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US1751982A
Cited
US2033442A
Cited
US2038267A
Cited
US2318236A
Cited
US2225395A
Cited
US2284051A
Cited
US2374989A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1956-10-12 | 1957-04-13 | 1957-10-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-10-12 | 1961-04-13 | 1961-10-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-10-12 | 1965-04-13 | 1965-10-13 | $7700.00 | Window Closed / Lapsed |