Patent US2514690A successfully refreshed from Google Patents.
US2514690A
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US
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Gas detection
Assignee: ROTARY ENGINEERING AND MANUFACTURING Co Inc
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Filing: 1946-08-26
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Granted: 1950-07-11
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Expires: 1966-08-26
Abstract
No abstract record available.
Inventors
- 👤 Jack E Bliss
- 👤 Olin R Prather
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 18:47
CPC Classifications
E; E21; E21B; E21B21/00; E21B21/06; E21B21/063; E21B21/065; E21B21/066; E21B49/00; E21B49/005; G; G01; G01N; G01N27/00; G01N27/02; G01N27/04; G01N27/14; G01N27/16
Claims Analysis
Total Claims: 0
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US2263108A
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US2341169A
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US2369811A
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US2361137A
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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) | 1953-07-10 | 1954-01-09 | 1954-07-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-07-10 | 1958-01-09 | 1958-07-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-07-10 | 1962-01-09 | 1962-07-11 | $7700.00 | Window Closed / Lapsed |