US2846537A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electric heaters
Assignee: Edwin L Wiegand Co
•
Filing: 1954-03-03
•
Granted: 1958-08-05
•
Expires: 1974-03-03
Abstract
No abstract record available.
Inventors
- 👤 Norman B Thornhill
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 13:48
CPC Classifications
H; H05; H05B; H05B3/00; H05B3/68; H05B3/76; Y; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/49002; Y10T29/49082; Y10T29/49087; Y10T29/49089; Y10T29/49091
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1718676A
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GB322520A
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US2322988A
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US2375058A
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US2347993A
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US2483839A
Cited
US2490934A
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US2480903A
Cited
US2489998A
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US2670529A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-08-04 | 1962-02-03 | 1962-08-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-08-04 | 1966-02-03 | 1966-08-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-08-04 | 1970-02-03 | 1970-08-05 | $7700.00 | Window Closed / Lapsed |