US3458821A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Variable gain controller
Assignee: International Business Machines Corp
•
Filing: 1966-07-05
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Granted: 1969-07-29
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Expires: 1986-07-05
Abstract
No abstract record available.
Inventors
- 👤 Ralph E Clarridge
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 21:25
CPC Classifications
G; G05; G05B; G05B13/00; G05B13/02; G05B13/0205; G05B13/024; G05B13/0245; G05B5/00; G05B5/01; G05B6/00; G05B6/02
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2860241A
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US2896095A
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US3206556A
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US3215824A
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US3237107A
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US3301510A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-07-28 | 1973-01-27 | 1973-07-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-07-28 | 1977-01-27 | 1977-07-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-07-28 | 1981-01-27 | 1981-07-29 | $7700.00 | Window Closed / Lapsed |