US3510686A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Controlled rectifier firing circuit
Assignee: ESB Inc
•
Filing: 1967-02-06
•
Granted: 1970-05-05
•
Expires: 1987-02-06
Abstract
No abstract record available.
Inventors
- 👤 Wilhelm J Zug
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 23:37
CPC Classifications
H; H02; H02M; H02M7/00; H02M7/02; H02M7/04; H02M7/12; H02M7/145; H02M7/155; H02M7/1555
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US3070739A
Cited
US3243689A
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US3262045A
Cited
US3184672A
Cited
US3296419A
Cited
US3371231A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-05-04 | 1973-11-03 | 1974-05-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-05-04 | 1977-11-03 | 1978-05-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-05-04 | 1981-11-03 | 1982-05-05 | $7700.00 | Window Closed / Lapsed |