US3529222A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Constant input impedance power supply circuit
Assignee: International Business Machines Corp
•
Filing: 1968-01-16
•
Granted: 1970-09-15
•
Expires: 1988-01-16
Abstract
No abstract record available.
Inventors
- 👤 Ronald E Gaitten
- 👤 Henry W Simpson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 15:10
CPC Classifications
G; G05; G05F; G05F1/00; G05F1/10; G05F1/12; G05F1/40; G05F1/44
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US3324378A
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US3328664A
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US3337787A
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US3383584A
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US3402336A
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US3365650A
Cited
US3403318A
Cited
US3376489A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-09-14 | 1974-03-16 | 1974-09-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-09-14 | 1978-03-16 | 1978-09-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-09-14 | 1982-03-16 | 1982-09-15 | $7700.00 | Window Closed / Lapsed |