US2549952A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Heating device and automatic control means therefor
Assignee: Individual
•
Filing: 1947-07-10
•
Granted: 1951-04-24
•
Expires: 1967-07-10
Abstract
No abstract record available.
Inventors
- 👤 Carlton M Wheelock
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 16:57
CPC Classifications
F; F24; F24C; F24C3/00; F24C3/12; F24C3/122; F23; F23D; F23D14/00; F23D14/02; F23D14/04; F23D14/045; F23D14/46; F23D14/48; F23D14/58; F23D14/583; F23D23/00; F23D2900/00; F23D2900/14; F23D2900/14062
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1134114A
Cited
US1932269A
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US2139344A
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US2168680A
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US2180789A
Cited
US2300560A
Cited
US2329682A
Cited
US2289082A
Cited
US2383641A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1954-04-23 | 1954-10-23 | 1955-04-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-04-23 | 1958-10-23 | 1959-04-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-04-23 | 1962-10-23 | 1963-04-24 | $7700.00 | Window Closed / Lapsed |