US2841680A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Control device for electric heating circuits
Assignee: Vibrantz Corp
•
Filing: 1954-03-01
•
Granted: 1958-07-01
•
Expires: 1974-03-01
Abstract
No abstract record available.
Inventors
- 👤 Daniel V Tuttle
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 07:53
CPC Classifications
H; H05; H05B; H05B1/00; H05B1/02; H05B1/0202; H05B1/0225; G; G04; G04C; G04C3/00; G04C3/04; G04C3/06; H01; H01H; H01H37/00; H01H37/02; H01H37/12
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2294573A
Cited
US2427300A
Cited
US2430257A
Cited
US2502823A
Cited
US2503082A
Cited
US2548028A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-06-30 | 1961-12-30 | 1962-07-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-06-30 | 1965-12-30 | 1966-07-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-06-30 | 1969-12-30 | 1970-07-01 | $7700.00 | Window Closed / Lapsed |