US3551836A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Differential amplifier circuit adapted for monolithic fabrication
Assignee: International Business Machines Corp
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Filing: 1968-01-17
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Granted: 1970-12-29
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Expires: 1988-01-17
Abstract
No abstract record available.
Inventors
- 👤 James C Greeson Jr
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 04:39
CPC Classifications
H; H03; H03F; H03F3/00; H03F3/45; H03F3/45071; H03F3/45076; H03F3/4508; H03F3/45085; H03F1/00; H03F1/30; H03F1/302; H03F1/34; H03F3/34; H03F3/343; H03F3/347; H03F3/45479; H03F3/45484; H03F3/45488; H03F3/45493; H03F3/45502; H03K; H03K5/00; H03K5/01; H03K5/02; H03F2203/00; H03F2203/45; H03F2203/45408; H03F2203/45472; H03F2203/45476; H03F2203/45648; Y; Y10; Y10S; Y10S15/00; Y10S15/15
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-12-28 | 1974-06-29 | 1974-12-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-12-28 | 1978-06-29 | 1978-12-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-12-28 | 1982-06-29 | 1982-12-29 | $7700.00 | Window Closed / Lapsed |