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US2478166A
Expired / Lapsed
US
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Process for removing carbon monoxide from air and gas mask canister therefor
Assignee: Minister of Supply In Her Majesty S Government
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Filing: 1942-09-29
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Granted: 1949-08-02
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Expires: 1962-09-29
Abstract
No abstract record available.
Inventors
- 👤 Boer Jan Hendrik De
- 👤 Johannes Van Ormondt
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 14:43
CPC Classifications
A; A62; A62B; A62B19/00
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
AT1309B
Cited
GB191128404A
Cited
US1345323A
Cited
US1422211A
Cited
US1519470A
Cited
GB436906A
Cited
GB413744A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1952-08-01 | 1953-01-31 | 1953-08-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1956-08-01 | 1957-01-31 | 1957-08-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1960-08-01 | 1961-01-31 | 1961-08-02 | $7700.00 | Window Closed / Lapsed |