Patent US3418418A successfully refreshed from Google Patents.
US3418418A
Expired / Lapsed
US
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Phase shift vibrato circuit using light dependent resistors and an indicating lamp
Assignee: Individual
•
Filing: 1964-05-25
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Granted: 1968-12-24
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Expires: 1984-05-25
Abstract
No abstract record available.
Inventors
- 👤 Wilder Dallas Richard
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 17:44
CPC Classifications
G; G10; G10H; G10H1/00; G10H1/02; G10H1/04; G10H1/043; Y; Y10; Y10S; Y10S84/00; Y10S84/19
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2910689A
Cited
US3119890A
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US3257495A
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US3256380A
Cited
US3286013A
Cited
US3255297A
Cited
US3327239A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1971-12-24 | 1972-06-24 | 1972-12-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-12-24 | 1976-06-24 | 1976-12-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-12-24 | 1980-06-24 | 1980-12-24 | $7700.00 | Window Closed / Lapsed |