US2633737A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Gas analyzer for plural mixtures
Assignee: Leica Microsystems Inc
•
Filing: 1945-05-25
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Granted: 1953-04-07
•
Expires: 1965-05-25
Abstract
No abstract record available.
Inventors
- 👤 Robert D Richardson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 05:14
CPC Classifications
G; G01; G01N; G01N27/00; G01N27/02; G01N27/04; G01N27/14; G01N27/18; G01N27/185
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1591444A
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US1644951A
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US1829649A
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US1707624A
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US1918702A
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US1931223A
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US2127845A
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US2241555A
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US2349860A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1956-04-06 | 1956-10-06 | 1957-04-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-04-06 | 1960-10-06 | 1961-04-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-04-06 | 1964-10-06 | 1965-04-07 | $7700.00 | Window Closed / Lapsed |