Patent US2441672A successfully refreshed from Google Patents.
US2441672A
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US
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Thermopile for furnace control
Assignee: GEN CONTROIS CO
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Filing: 1942-07-21
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Granted: 1948-05-18
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Expires: 1962-07-21
Abstract
No abstract record available.
Inventors
- 👤 William A Ray
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 17:35
CPC Classifications
G; G01; G01J; G01J5/00; G01J5/10; G01J5/12
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1038258A
Cited
FR430974A
Cited
US1734837A
Cited
US1891039A
Cited
US2162098A
Cited
US2113858A
Cited
US2149853A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1951-05-18 | 1951-11-17 | 1952-05-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1955-05-18 | 1955-11-17 | 1956-05-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1959-05-18 | 1959-11-17 | 1960-05-18 | $7700.00 | Window Closed / Lapsed |