US3102202A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Photometric instruments
Assignee: GAF Chemicals Corp
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Filing: 1960-04-12
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Granted: 1963-08-27
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Expires: 1980-04-12
Abstract
No abstract record available.
Inventors
- 👤 Russell P Easton
- 👤 Binghamton First-City Natio Of
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 18:41
CPC Classifications
G; G01; G01N; G01N21/00; G01N21/17; G01N21/59; G01N21/5907
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
109 words
A CONTROL SYSTEM FOR AUTOMATICALLY VARYING THE SENSITIVITY OF A PHOTOMULTIPLIER TUBE BY MEANS OF VARIATION OF DYNODE VOLTAGE, INCLUDING AN AMPLIFIER RESPONSIVE TO VARIATIONS OF THE ANODE CURRENT OF SAID MULTIPLIER TUBE, A FIRST CONTROL TUBE ASSOCIATED WITH SAID AMPLIFIER, THE CURRENT CONDUCTIVITY OF SAID TUBE DETERMINING THE EFFECTIVE DYNODE POTENTIAL, IMPEDANCE MEANS IN THE ANODE CIRCUIT OF SAID MULTIPLIER TUBE AND A CIRCUIT INCLUDING SAID IMPEDANCE AND A SECOND CONTROL TUBE FOR VARYING CURRENT FLOW IN SAID IMPEDANCE IN INVERSE RELATION TO SAID DYNODE POTENTIAL WHEREBY THE EFFECTIVE ANODE CURRENT OF SAID MULTIPLIER TUBE IS CAUSED TO VARY IN INVERSE RELATION OF VARIATION IN SAID DYNODE VOLTAGE.
Claim 2
Dependent Claim
109 words
A CONTROL SYSTEM FOR AUTOMATICALLY VARYING THE SENSITIVITY OF A PHOTOMULTIPLIER TUBE BY MEANS OF VARIATION OF DYNODE VOLTAGE, INCLUDING AN AMPLIFIER RESPONSIVE TO VARIATIONS OF THE ANODE CURRENT OF SAID MULTIPLIER TUBE, A FIRST CONTROL TUBE ASSOCIATED WITH SAID AMPLIFIER, THE CURRENT CONDUCTIVITY OF SAID TUBE DETERMINING THE EFFECTIVE DYNODE POTENTIAL, IMPEDANCE MEANS IN THE ANODE CIRCUIT OF SAID MULTIPLIER TUBE AND A CIRCUIT INCLUDING SAID IMPEDANCE AND A SECOND CONTROL TUBE FOR VARYING CURRENT FLOW IN SAID IMPEDANCE IN INVERSE RELATION TO SAID DYNODE POTENTIAL WHEREBY THE EFFECTIVE ANODE CURRENT OF SAID MULTIPLIER TUBE IS CAUSED TO VARY IN INVERSE RELATION OF VARIATION IN SAID DYNODE VOLTAGE.
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) | 1966-08-26 | 1967-02-25 | 1967-08-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-08-26 | 1971-02-25 | 1971-08-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-08-26 | 1975-02-25 | 1975-08-27 | $7700.00 | Window Closed / Lapsed |