Patent US4527239A successfully refreshed from Google Patents.
Patent US3379968A successfully refreshed from Google Patents.
US3379968A
Expired / Lapsed
US
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Method and means for detection of gases and vapors
Assignee: Individual
•
Filing: 1967-08-07
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Granted: 1968-04-23
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Expires: 1987-08-07
Abstract
No abstract record available.
Inventors
- 👤 Yamane Mikiya
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 12:03
CPC Classifications
G; G01; G01N; G01N27/00; G01N27/62; G01N27/64; G01N27/66; G01N30/00; G01N30/02; G01N30/62; G01N30/64; G01N30/70
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
186 words
A DEVICE FOR DETECTING GASES AND VAPORS BY IONIZATION DUE TO IRRADIATION OF PRIMARY ELECTRONS GENERATED BY THE IONIZATION ACTION OF AN ELECTRIC DISCHARGE, COMPRISING A DISCHARGE CHAMBER; A SENSING CHAMBER CONNECTED TO SAID DISCHARGE CHAMBER BY A CONSTRICTED AND CONCENTRICALLY ALIGNED CONNECTOR; A PAIR OF DISCHARGE ELECTRODES DISPOSED IN SAID DISCHARGE CHAMBER IN MUTUALLY OPPOSED POSITION FACING IN THE DIRECTION OF SAID CONNECTOR; A FIRST POWER SOURCE; ONE OF SAID ELECTRODES BEING CONNECTED TO THE NEGATIVE TERMINAL OF SAID FIRST POWER SOURCE; THE OTHER ELECTRODE BEING GROUNDED; A DISCHARGE GAS INLET LEADING INTO SAID DISCHARGE CHAMBER IN THE DIRECTION OF ITS CENTER AXIS; A CARRIER GAS INLET LEADING IN THE DIRECTION OF THE CENTER AXIS OF SAID SENSING CHAMBER FOR THE INTRODUCTION OF A SAMPLE GAS THEREIN; AN ANODE AND AN OPPOSING CATHODE DISPOSED IN SAID SENSING CHAMBER; A SECOND POWER SOURCE; SAID ANODE BEING CONNECTED TO THE POSITIVE TERMINAL OF SAID SECOND POWER SOURCE; SAID CATHODE BEING CONNECTED TO A CIRCUIT FOR MEASURING ELECTRIC CURRENT DUE TO IONIZATION OF SAID SAMPLE GAS; AND GAS OUTLET MEANS FROM SAID DISCHARGE CHAMBER AND SAID SENSING CHAMBER.
Claim 2
Independent Claim
186 words
A DEVICE FOR DETECTING GASES AND VAPORS BY IONIZATION DUE TO IRRADIATION OF PRIMARY ELECTRONS GENERATED BY THE IONIZATION ACTION OF AN ELECTRIC DISCHARGE, COMPRISING A DISCHARGE CHAMBER; A SENSING CHAMBER CONNECTED TO SAID DISCHARGE CHAMBER BY A CONSTRICTED AND CONCENTRICALLY ALIGNED CONNECTOR; A PAIR OF DISCHARGE ELECTRODES DISPOSED IN SAID DISCHARGE CHAMBER IN MUTUALLY OPPOSED POSITION FACING IN THE DIRECTION OF SAID CONNECTOR; A FIRST POWER SOURCE; ONE OF SAID ELECTRODES BEING CONNECTED TO THE NEGATIVE TERMINAL OF SAID FIRST POWER SOURCE; THE OTHER ELECTRODE BEING GROUNDED; A DISCHARGE GAS INLET LEADING INTO SAID DISCHARGE CHAMBER IN THE DIRECTION OF ITS CENTER AXIS; A CARRIER GAS INLET LEADING IN THE DIRECTION OF THE CENTER AXIS OF SAID SENSING CHAMBER FOR THE INTRODUCTION OF A SAMPLE GAS THEREIN; AN ANODE AND AN OPPOSING CATHODE DISPOSED IN SAID SENSING CHAMBER; A SECOND POWER SOURCE; SAID ANODE BEING CONNECTED TO THE POSITIVE TERMINAL OF SAID SECOND POWER SOURCE; SAID CATHODE BEING CONNECTED TO A CIRCUIT FOR MEASURING ELECTRIC CURRENT DUE TO IONIZATION OF SAID SAMPLE GAS; AND GAS OUTLET MEANS FROM SAID DISCHARGE CHAMBER AND SAID SENSING CHAMBER.
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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) | 1971-04-23 | 1971-10-23 | 1972-04-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-04-23 | 1975-10-23 | 1976-04-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-04-23 | 1979-10-23 | 1980-04-23 | $7700.00 | Window Closed / Lapsed |