US3478255A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Pulse amplitude detection circuit
Assignee: International Business Machines Corp
•
Filing: 1966-09-06
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Granted: 1969-11-11
•
Expires: 1986-09-06
Abstract
No abstract record available.
Inventors
- 👤 Gerald R Parker
- 👤 Ambrose A Verdibello
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 16:26
CPC Classifications
G; G11; G11B; G11B20/00; G11B20/10; G11B20/10009; G01; G01R; G01R33/00; G01R33/12; G01R33/1207
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2840707A
Cited
US3390381A
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US3287570A
Cited
US3375501A
Cited
US3336518A
Cited
US3392372A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-11-10 | 1973-05-12 | 1973-11-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-11-10 | 1977-05-12 | 1977-11-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-11-10 | 1981-05-12 | 1981-11-11 | $7700.00 | Window Closed / Lapsed |