US3435329A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Scr type alternating current electric power control
Assignee: National Research Development Corp UK
•
Filing: 1966-03-15
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Granted: 1969-03-25
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Expires: 1986-03-15
Abstract
No abstract record available.
Inventors
- 👤 Colin Edward Hunter
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 20:40
CPC Classifications
G; G05; G05F; G05F1/00; G05F1/10; G05F1/12; G05F1/40; G05F1/44; G05F1/445; G05F1/45; G05F1/455; H; H02; H02P; H02P25/00; H02P25/02; H02P25/10; H02P25/14; H02P25/145; Y; Y10; Y10S; Y10S388/00; Y10S388/907; Y10S388/917
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2748317A
Cited
US2921247A
Cited
US3241023A
Cited
US3181046A
Cited
US3346794A
Cited
US3310758A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-03-24 | 1972-09-23 | 1973-03-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-03-24 | 1976-09-23 | 1977-03-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-03-24 | 1980-09-23 | 1981-03-25 | $7700.00 | Window Closed / Lapsed |