US3202933A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Negative resistance photomultiplier oscillator
Assignee: Bausch and Lomb Inc
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Filing: 1961-08-10
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Granted: 1965-08-24
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Expires: 1981-08-10
Abstract
No abstract record available.
Inventors
- 👤 Naranappa K Shankar
- 👤 Alexander E Martens
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 12:14
CPC Classifications
H; H03; H03B; H03B7/00; H03B7/02; H03B7/04
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
121 words
AN OSCILLATOR CIRCUIT COMPRISING, A PHOTOMULTIPLIER TUBE OPERATING WITHIN ITS NEGATIVE RESISTANCE CHARACTERISTIC, RESISTANCE MEANS CONNECTED BETWEEN THE CATHODE AND THE FIRST DYNODE OF SAID PHOTOMULTIPHLIER TUBE, A SOURCE OF NEGATIVE POTENTIAL CONNECTED TO SAID CATHODE, A PLURALITY OF SERIALLY CONNECTED RESISTANCE ELEMENT EACH SUCCESSIVE ONE CONNECTED BETWEEN SUCCESSIVE DYNODES OF SAID PHOTO MULTIPHIER TUBE, A RESISTANCE ELEMENT CONNECTED TO THE LAST DYNODE OF SAID PHOTOMULIPLIER TUBE AND ADAPTED FOR CONNECTION WITH A POSITIVE POTENTIAL, A TANK CIRCUIT CONNECTED TO THE ANODE OF SAID PHOTOMULTIPLIER TUBE AND ADAPTED FOR CONNECTION TO THE POSITIVE POTENTAIL, A BAND PASS FILTER CONNECTED BETWEEN THE LAST DYNODE AND THE ANODE PROVIDING REGENERATIVE FEEDBACK TO THE TANK CIRCUIT IN SAID ANODE CIRCUIT THEREBY PROVIDING OSCILATORY OUTPUT.
Claim 2
Dependent Claim
121 words
AN OSCILLATOR CIRCUIT COMPRISING, A PHOTOMULTIPLIER TUBE OPERATING WITHIN ITS NEGATIVE RESISTANCE CHARACTERISTIC, RESISTANCE MEANS CONNECTED BETWEEN THE CATHODE AND THE FIRST DYNODE OF SAID PHOTOMULTIPHLIER TUBE, A SOURCE OF NEGATIVE POTENTIAL CONNECTED TO SAID CATHODE, A PLURALITY OF SERIALLY CONNECTED RESISTANCE ELEMENT EACH SUCCESSIVE ONE CONNECTED BETWEEN SUCCESSIVE DYNODES OF SAID PHOTO MULTIPHIER TUBE, A RESISTANCE ELEMENT CONNECTED TO THE LAST DYNODE OF SAID PHOTOMULIPLIER TUBE AND ADAPTED FOR CONNECTION WITH A POSITIVE POTENTIAL, A TANK CIRCUIT CONNECTED TO THE ANODE OF SAID PHOTOMULTIPLIER TUBE AND ADAPTED FOR CONNECTION TO THE POSITIVE POTENTAIL, A BAND PASS FILTER CONNECTED BETWEEN THE LAST DYNODE AND THE ANODE PROVIDING REGENERATIVE FEEDBACK TO THE TANK CIRCUIT IN SAID ANODE CIRCUIT THEREBY PROVIDING OSCILATORY OUTPUT.
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) | 1968-08-23 | 1969-02-22 | 1969-08-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-08-23 | 1973-02-22 | 1973-08-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-08-23 | 1977-02-22 | 1977-08-24 | $7700.00 | Window Closed / Lapsed |