US3493685A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Power supply regulator and amplifier circuits
Assignee: US Philips Corp
•
Filing: 1966-09-28
•
Granted: 1970-02-03
•
Expires: 1986-09-28
Abstract
No abstract record available.
Inventors
- 👤 Brian Ernest Attwood
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 10:29
CPC Classifications
H; H03; H03F; H03F1/00; H03F1/02; H03F1/0205; H03F1/0261; G; G05; G05F; G05F1/00; G05F1/10; G05F1/46; H03F1/30; H03F1/302; H03F3/00; H03F3/20; H03F3/21; H03F3/217
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US3256492A
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US3112365A
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US3218393A
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US3286157A
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US3145334A
Cited
US3191126A
Cited
US3393363A
Cited
US3260924A
Cited
US3323037A
Cited
US3418433A
Cited
US3388214A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-02-02 | 1973-08-04 | 1974-02-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-02-02 | 1977-08-04 | 1978-02-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-02-02 | 1981-08-04 | 1982-02-03 | $7700.00 | Window Closed / Lapsed |