Patent US2029335A successfully refreshed from Google Patents.
US3453554A
Expired / Lapsed
US
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High performance circuit instrumentation amplifier with high common mode rejection
Assignee: Beckman Coulter Inc
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Filing: 1968-08-05
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Granted: 1969-07-01
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Expires: 1988-08-05
Abstract
No abstract record available.
Inventors
- 👤 William E Shoemaker
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 20:52
CPC Classifications
H; H03; H03F; H03F3/00; H03F3/45; H03F3/45071; H03F3/45479; H03F2200/00; H03F2200/261
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US3304507A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-06-30 | 1972-12-30 | 1973-07-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-06-30 | 1976-12-30 | 1977-07-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-06-30 | 1980-12-30 | 1981-07-01 | $7700.00 | Window Closed / Lapsed |