US3249925A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Sample and hold system
Assignee: Beckman Coulter Inc
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Filing: 1961-11-28
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Granted: 1966-05-03
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Expires: 1981-11-28
Abstract
No abstract record available.
Inventors
- 👤 Charles H Single
- 👤 John A Brussolo
- 👤 Edward M Billinghurst
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 21:33
CPC Classifications
H; H03; H03K; H03K5/00; H03K5/22; H03K5/24; H03K5/2409; H03K5/2418; G; G06; G06G; G06G7/00; G06G7/04; G11; G11C; G11C27/00; G11C27/02; G11C27/024; G11C27/026
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
236 words
A SAMPLE AND HOLD SYSTEM COMPRISING: AN AMPLIFIER; A SMALL STABILIZING CAPACITOR CONNECTED BETWEEN THE INPUT AND OUTPUT OF SAID AMPLIFIER; A FIRST SWITCHING MEANS HAVING A FIRST MOVABLE CONTACT ADAPTED TO ENGAGE EITHER A FIRST OR A SECOND FIXED CONTACT, AND A SECOND MOVABLE CONTACT ADAPTED TO ENGAGE EITHER A THIRD OR A FOURTH FIXED CONTACT; A SECOND SWITCHING MEANS FOR SELECTIVELY INTERCONNECTING A FIRST TERMINAL WITH A SECOND TERMINAL A RELATIVELY LARGE STORAGE CAPACITOR CONNECTED BETWEEN THE OUTPUT OF SAID AMPLIFIER AND THE FIRST TERMINAL OF SAID SECOND SWITCHING MEANS; MEANS FOR LIMITING CURRENT CONNECTED BETWEEN THE SECOND TERMINAL OF SAID SECOND SWITCH AND GROUND; MEANS CONNECTING THE FIRST FIXED CONTACT OF SAID FIRST SWITCHING MEANS TO THE FIRST TERMINAL OF SAID SECOND SWITCHING MEANS; MEANS CONNECTING THE FIRST MOVABLE CONTACT OF SAID FIRST SWITCHING MEANS TO THE INPUT OF SAID AMPLIFIER A FEEDBACK RESISTOR CONNECTED BETWEEN THE OUTPUT OF SAID AMPLIFIER AND THE SECOND FIXED CONTACT OF SAID FIRST SWITCHING MEANS; AN INPUT RESISTOR CONNECTED BETWEEN AN INPUT TERMINAL AND THE SECOND FIXED CONTACT OF SAID FIRST SWITCHING MEANS; A COMPENSATING CAPACITOR CONNECTED BETWEEN SAID INPUT TERMINAL AND THE FOURTH FIXED CONTACT OF SAID FIRST SWITCHING MEANS; MEANS CONNECTING THE SECOND MOVABLE CONTACT OF SAID FIRST SWITCHING MEANS TO THE SECOND FIXED CONTACT OF SAID SAID FIRST SWITCHING MEANS; AND MEANS CONNECTING THE THIRD FIXED CONTACT OF SAID FIRST SWITCHING MEANS TO GROUND.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-05-02 | 1969-11-01 | 1970-05-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-05-02 | 1973-11-01 | 1974-05-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-05-02 | 1977-11-01 | 1978-05-03 | $7700.00 | Window Closed / Lapsed |