Patent US2464087A successfully refreshed from Google Patents.
US2464087A
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Method for determining oxygen in gases
Assignee: MSA Safety Inc
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Filing: 1943-05-22
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Granted: 1949-03-08
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Expires: 1963-05-22
Abstract
No abstract record available.
Inventors
- 👤 Moses G Jacobson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 18:57
CPC Classifications
G; G01; G01N; G01N27/00; G01N27/26; G01N27/403; G01N27/404
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US940850A
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US1846354A
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US1951395A
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US1901344A
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US2190835A
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US2183531A
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US2275281A
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US2311977A
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US2350378A
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US2278248A
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US2382734A
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US2401287A
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US2370871A
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1952-03-07 | 1952-09-06 | 1953-03-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1956-03-07 | 1956-09-06 | 1957-03-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1960-03-07 | 1960-09-06 | 1961-03-08 | $7700.00 | Window Closed / Lapsed |