US2554945A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Heat-regulating system
Assignee: Warren Webster & Co
•
Filing: 1947-07-11
•
Granted: 1951-05-29
•
Expires: 1967-07-11
Abstract
No abstract record available.
Inventors
- 👤 Gerald Alan S Fitz
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 09:03
CPC Classifications
G; G05; G05D; G05D23/00; G05D23/19; G05D23/20; G05D23/24; G05D23/2451; G05D23/2456; F; F24; F24D; F24D19/00; F24D19/10; F24D19/1006; F24D19/1009
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2249844A
Cited
US1979311A
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US2277849A
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US2216301A
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US2338423A
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US2297836A
Cited
US2402210A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1954-05-28 | 1954-11-27 | 1955-05-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-05-28 | 1958-11-27 | 1959-05-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-05-28 | 1962-11-27 | 1963-05-29 | $7700.00 | Window Closed / Lapsed |