US3304507A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Sample and hold system having an overall potentiometric configuration
Assignee: Beckman Coulter Inc
•
Filing: 1964-02-07
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Granted: 1967-02-14
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Expires: 1984-02-07
Abstract
No abstract record available.
Inventors
- 👤 Barret B Weekes
- 👤 Leland B Smith
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 02:30
CPC Classifications
G; G11; G11C; G11C27/00; G11C27/02; G11C27/024; G11C27/026
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
105 words
A SAMPLE AND HOLD SYSTEM HAVING ZERO SAMPLING TIME COMPRISING FIRST AND SECOND RC NETWORKS, POTENTIOMETRIC AMPLIFIER MEANS INCLUDING MEANS FOR FEEDING BACK ONLY A PORTION OF THE OUTPUT TO THE INPUT, FOR ISOLATING EACH OF SAID RC NETWORKS FROM LOADING EFFECTS DURING THE HOLD MODE, SWITCHING MEANS FOR SELECTIVELY CONNECTING A SIGNAL TO BE SAMPLED TO SAID RC NETWORKS FOR CHARGING THE CAPACITIVE IMPEDANCE OF ONE OF SAID RC NETWORKS TO A VOLTAGE PROPORTIONAL TO THE SYSTEM INPUT SIGNAL SO THAT ONE OF SAID CAPACITIVE IMPEDANCES IS CHARGED DURING A SAMPLE MODE WHILE THE OTHER OF SAID CAPACITIVE IMPEDANCES SIMULTANEOUSLY PROVIDES A HOLD MODE.
References Cited (Backward Citations)
CA575119A
Cited
US2950052A
Cited
US3058068A
Cited
US3127565A
Cited
US3079086A
Cited
US3229212A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1970-02-13 | 1970-08-15 | 1971-02-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-02-13 | 1974-08-15 | 1975-02-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-02-13 | 1978-08-15 | 1979-02-14 | $7700.00 | Window Closed / Lapsed |