US2666124A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Control apparatus for electrical heating units
Assignee: Proctor Electric Co
•
Filing: 1950-04-25
•
Granted: 1954-01-12
•
Expires: 1970-04-25
Abstract
No abstract record available.
Inventors
- 👤 Walter H Vogelsberg
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 14:54
CPC Classifications
H; H05; H05B; H05B1/00; H05B1/02; H05B1/0202; H05B1/0213
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US2409414A
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US2418359A
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1957-01-11 | 1957-07-13 | 1958-01-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-01-11 | 1961-07-13 | 1962-01-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-01-11 | 1965-07-13 | 1966-01-12 | $7700.00 | Window Closed / Lapsed |