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Patent US3412268A successfully refreshed from Google Patents.
US3412268A
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Zener diodes balancing circuit
Assignee: Phillips Petroleum Co
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Filing: 1965-06-25
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Granted: 1968-11-19
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Expires: 1985-06-25
Abstract
No abstract record available.
Inventors
- 👤 Ford Donald D De
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 15:31
CPC Classifications
G; G01; G01N; G01N27/00; G01N27/02; G01N27/04; G01N27/14; G01N27/18; G01N27/185; G01N30/00; G01N30/02; G01N30/62; G01N30/64; G01R; G01R17/00; G01R17/10; G01R17/105
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US3101606A
Cited
US2945950A
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US3062039A
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US3150332A
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US3250991A
Cited
US3263092A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1971-11-19 | 1972-05-20 | 1972-11-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-11-19 | 1976-05-20 | 1976-11-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-11-19 | 1980-05-20 | 1980-11-19 | $7700.00 | Window Closed / Lapsed |