US2483154A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electric heating system for buildings
Assignee: CORNERCROFT Ltd
•
Filing: 1946-06-11
•
Granted: 1949-09-27
•
Expires: 1966-06-11
Abstract
No abstract record available.
Inventors
- 👤 Rycroft Norman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 13:09
CPC Classifications
F; F24; F24D; F24D3/00
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1067647A
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US1437420A
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US1509810A
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US1763328A
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US1985215A
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US1945139A
Cited
US1980299A
Cited
US2058769A
Cited
US2153382A
Cited
US2375870A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1952-09-26 | 1953-03-28 | 1953-09-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1956-09-26 | 1957-03-28 | 1957-09-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1960-09-26 | 1961-03-28 | 1961-09-27 | $7700.00 | Window Closed / Lapsed |