US3293539A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Variable full-wave power control circuit
Assignee: Robertshaw Controls Co
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Filing: 1963-01-25
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Granted: 1966-12-20
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Expires: 1983-01-25
Abstract
No abstract record available.
Inventors
- 👤 William W Chambers
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 11:11
CPC Classifications
G; G05; G05F; G05F1/00; G05F1/10; G05F1/12; G05F1/40; G05F1/44; G05F1/32; G05F1/34; G05F1/38; G05F3/00; G05F3/02; G05F3/04; G05F3/06; Y; Y10; Y10S; Y10S315/00; Y10S315/04
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-12-19 | 1970-06-20 | 1970-12-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-12-19 | 1974-06-20 | 1974-12-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-12-19 | 1978-06-20 | 1978-12-20 | $7700.00 | Window Closed / Lapsed |