Patent US2319898A successfully refreshed from Google Patents.
US1121635A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Controller for heating systems.
Assignee: Gold Car Heating & Lighting Co
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Filing: 1913-06-07
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Granted: 1914-12-22
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Expires: 1933-06-07
Abstract
No abstract record available.
Inventors
- 👤 Frederick T Kitchen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 17:07
CPC Classifications
H; H01; H01H; H01H37/00; H01H37/02; H01H37/64; H01H37/66; Y; Y10; Y10S; Y10S200/00; Y10S200/27
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1917-12-21 | 1918-06-22 | 1918-12-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1921-12-21 | 1922-06-22 | 1922-12-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1925-12-21 | 1926-06-22 | 1926-12-22 | $7700.00 | Window Closed / Lapsed |