Patent US3251998A successfully refreshed from Google Patents.
US3251998A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for gating the photo-multiplier of a scintillation detector
Assignee: ExxonMobil Upstream Research Co
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Filing: 1962-11-29
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Granted: 1966-05-17
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Expires: 1982-11-29
Abstract
No abstract record available.
Inventors
- 👤 Donald H Britton
- 👤 Wilmer A Hoyer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 13:51
CPC Classifications
G; G01; G01T; G01T1/00; G01T1/16; G01T1/20; G01T1/208
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
143 words
APPARATUS FOR GATING THE OUTPUT SIGNALS OF A PHOTOMULTIPLIER COMPRISING: FIRST AND SECOND AMPLIFIER-TYPE VACUUM TUBE CIRCUITS CONNECTED TO A COMMON CATHODE RESISTOR; MEANS ELECTRICALLY CONNECTING SAID FIRST VACUUM TUBE CIRCUIT TO SAID PHOTOMULTIPLIER FOR APPLYING SAID OUTPUT SIGNALS TO THE CONTROL GRID OF SAID FIRST VACUUM TUBE; MEANS CONNECTED TO SAID FIRST VACUUM TUBE CIRCUIT FOR APPLYING A POSITIVE PULSE TO THE CONTROL GRID OF SAID FIRST VACUUM TUBE; MEANS CONNECTED IN SAID SECOND VACUUM TUBE CIRCUIT FOR MAINTAINING SUFFICIENT CURRENT THROUGH SAID SECOND VACUUM TUBE TO CUT OFF CONDUCTION THROUGH SAID FIRST VACUUM TUBE BECAUSE OF THE VOLTAGE DROP ACROSS SAID COMMON CATHODE RESISTOR; MEANS FOR APPLYING A GATING PULSE EQUAL AND OPPOSITE TO SAID POSITIVE PULSE TO SAID SECOND VACUUM TUBE TO PERMIT SAID FIRST VACUUM TUBE TO AMPLIFY AND CONDUCT SAID OUTPUT SIGNALS; AND MEANS FOR BALANCING SWITCHING TRANSIENTS.
Claim 2
Dependent Claim
143 words
APPARATUS FOR GATING THE OUTPUT SIGNALS OF A PHOTOMULTIPLIER COMPRISING: FIRST AND SECOND AMPLIFIER-TYPE VACUUM TUBE CIRCUITS CONNECTED TO A COMMON CATHODE RESISTOR; MEANS ELECTRICALLY CONNECTING SAID FIRST VACUUM TUBE CIRCUIT TO SAID PHOTOMULTIPLIER FOR APPLYING SAID OUTPUT SIGNALS TO THE CONTROL GRID OF SAID FIRST VACUUM TUBE; MEANS CONNECTED TO SAID FIRST VACUUM TUBE CIRCUIT FOR APPLYING A POSITIVE PULSE TO THE CONTROL GRID OF SAID FIRST VACUUM TUBE; MEANS CONNECTED IN SAID SECOND VACUUM TUBE CIRCUIT FOR MAINTAINING SUFFICIENT CURRENT THROUGH SAID SECOND VACUUM TUBE TO CUT OFF CONDUCTION THROUGH SAID FIRST VACUUM TUBE BECAUSE OF THE VOLTAGE DROP ACROSS SAID COMMON CATHODE RESISTOR; MEANS FOR APPLYING A GATING PULSE EQUAL AND OPPOSITE TO SAID POSITIVE PULSE TO SAID SECOND VACUUM TUBE TO PERMIT SAID FIRST VACUUM TUBE TO AMPLIFY AND CONDUCT SAID OUTPUT SIGNALS; AND MEANS FOR BALANCING SWITCHING TRANSIENTS.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-05-16 | 1969-11-15 | 1970-05-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-05-16 | 1973-11-15 | 1974-05-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-05-16 | 1977-11-15 | 1978-05-17 | $7700.00 | Window Closed / Lapsed |