Patent US2498054A successfully refreshed from Google Patents.
US2498054A
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US
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Electric heating system with modulating control
Assignee: Individual
•
Filing: 1945-11-20
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Granted: 1950-02-21
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Expires: 1965-11-20
Abstract
No abstract record available.
Inventors
- 👤 Riley H Taylor
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 15:38
CPC Classifications
H; H05; H05B; H05B1/00; H05B1/02; H05B1/0227; H05B1/0252; H05B1/0275; H05B1/0277
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US1129842A
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US1277621A
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FR598604A
Cited
US1669582A
Cited
GB346825A
Cited
FR792066A
Cited
GB455929A
Cited
US2230260A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1953-02-20 | 1953-08-22 | 1954-02-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-02-20 | 1957-08-22 | 1958-02-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-02-20 | 1961-08-22 | 1962-02-21 | $7700.00 | Window Closed / Lapsed |