US3109136A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Ionization vacuum gauge
Assignee: NEC Corp
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Filing: 1960-02-11
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Granted: 1963-10-29
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Expires: 1980-02-11
Abstract
No abstract record available.
Inventors
- 👤 Asamaki Tatsuo
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 05:28
CPC Classifications
H; H01; H01J; H01J41/00; H01J41/02; H01J41/04
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
137 words
AN IONIZATION VACUUM GAUGE FOR DETERMINING THE GAS PRESSURE WITHIN A VESSEL, COMPRISING A TUBE HAVING A PLURALITY OF SERIALLY ARRANGED ELECTRODES, MEANS CONNECTING THE INTERIOR OF SAID TUBE WITH THE INTERIOR OF SAID VESSEL, WHEREBY THERE IS COMMUNICATION OF GAS THEREBETWEEN, SAID ELECTRODES COMPRISING IN SEQUENCE AN EMITTER ELECTRODE, AN ACCELERATING ELECTRODE, A RETARDING ELECTRODE AN A COLLECTOR ELECTRODE, MEANS FOR BIASING SAID ACCELERATING AND COLLECTOR ELECTRODES WITH A POSITIVE POLARITY RELATIVE TO SAID EMITTER ELECTRODE AND SAID RETARDING ELECTRODE WITH A NEGATIVE POLARITY RELATIVE TO SAID EMITTER ELECTRODE, WHEREBY ELECTRONS EMITTED BY SAID EMITTER ELECTRODE ARE ATTRACTED TO SAID ACCELERATING AND COLLECTOR ELECTRODE ARE ATTRACTED TO BY SAID RETARDING ELETRODE, AND MEANS CONNECTED TO SAID COLLECTOR ELECTRODE RESPONSIVE TO CHANGES IN THE COLLECTOR CURRENT FOR PROVIDING AN INDICATION OF THE GAS PRESSURE IN SAID VESSEL.
Claim 2
Dependent Claim
137 words
AN IONIZATION VACUUM GAUGE FOR DETERMINING THE GAS PRESSURE WITHIN A VESSEL, COMPRISING A TUBE HAVING A PLURALITY OF SERIALLY ARRANGED ELECTRODES, MEANS CONNECTING THE INTERIOR OF SAID TUBE WITH THE INTERIOR OF SAID VESSEL, WHEREBY THERE IS COMMUNICATION OF GAS THEREBETWEEN, SAID ELECTRODES COMPRISING IN SEQUENCE AN EMITTER ELECTRODE, AN ACCELERATING ELECTRODE, A RETARDING ELECTRODE AN A COLLECTOR ELECTRODE, MEANS FOR BIASING SAID ACCELERATING AND COLLECTOR ELECTRODES WITH A POSITIVE POLARITY RELATIVE TO SAID EMITTER ELECTRODE AND SAID RETARDING ELECTRODE WITH A NEGATIVE POLARITY RELATIVE TO SAID EMITTER ELECTRODE, WHEREBY ELECTRONS EMITTED BY SAID EMITTER ELECTRODE ARE ATTRACTED TO SAID ACCELERATING AND COLLECTOR ELECTRODE ARE ATTRACTED TO BY SAID RETARDING ELETRODE, AND MEANS CONNECTED TO SAID COLLECTOR ELECTRODE RESPONSIVE TO CHANGES IN THE COLLECTOR CURRENT FOR PROVIDING AN INDICATION OF THE GAS PRESSURE IN SAID VESSEL.
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) | 1966-10-28 | 1967-04-29 | 1967-10-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-10-28 | 1971-04-29 | 1971-10-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-10-28 | 1975-04-29 | 1975-10-29 | $7700.00 | Window Closed / Lapsed |