Patent US2443427A successfully refreshed from Google Patents.
US2443427A
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Infrared gas analyzer
Assignee: Wyeth Holdings LLC
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Filing: 1944-08-29
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Granted: 1948-06-15
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Expires: 1964-08-29
Abstract
No abstract record available.
Inventors
- 👤 Ray E Kidder
- 👤 John W Berry
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 04:17
CPC Classifications
G; G01; G01N; G01N21/00; G01N21/17; G01N21/25; G01N21/31; G01N21/35; G01N21/37; Y; Y10; Y10T; Y10T436/00; Y10T436/17; Y10T436/172307; Y10T436/18; Y10T436/182; Y10T436/184; Y10T436/186; Y10T436/20; Y10T436/204998
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1951-06-15 | 1951-12-15 | 1952-06-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1955-06-15 | 1955-12-15 | 1956-06-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1959-06-15 | 1959-12-15 | 1960-06-15 | $7700.00 | Window Closed / Lapsed |