US2723335A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Clock controlled electric heater
Assignee: Individual
•
Filing: 1952-06-21
•
Granted: 1955-11-08
•
Expires: 1972-06-21
Abstract
No abstract record available.
Inventors
- 👤 Paul M Hotchkin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 22:15
CPC Classifications
H; H05; H05B; H05B1/00; H05B1/02; H05B1/0202; H05B1/0225; A; A47; A47J; A47J31/00; A47J31/44; A47J31/52; G; G04; G04C; G04C23/00; G04C23/14; G04C23/16
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1852102A
Cited
US2145082A
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US2295298A
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US2268737A
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US2392166A
Cited
US2451069A
Cited
US2434471A
Cited
US2606991A
Cited
US2509693A
Cited
US2610284A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1958-11-07 | 1959-05-09 | 1959-11-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1962-11-07 | 1963-05-09 | 1963-11-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1966-11-07 | 1967-05-09 | 1967-11-08 | $7700.00 | Window Closed / Lapsed |