US2897429A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Supply circuit transistor current control for electric loads
Assignee: US Philips Corp
•
Filing: 1954-06-07
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Granted: 1959-07-28
•
Expires: 1974-06-07
Abstract
No abstract record available.
Inventors
- 👤 Jochems Pieter Johan Wilhelmus
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 09:49
CPC Classifications
H; H02; H02M; H02M1/00; H02M1/14; H02M1/15; G; G05; G05F; G05F1/00; G05F1/10; G05F1/46; G05F3/00; G05F3/02; G05F3/08; G05F3/10; G05F3/16; G05F3/20; G05F3/22; G05F3/222; G05F3/227
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2576056A
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US2585078A
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US2730576A
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US2693568A
Cited
US2790132A
Cited
US2663806A
Cited
US2663830A
Cited
US2698416A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-07-27 | 1963-01-26 | 1963-07-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-07-27 | 1967-01-26 | 1967-07-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-07-27 | 1971-01-26 | 1971-07-28 | $7700.00 | Window Closed / Lapsed |