US3277296A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Detection of electronegative compositions by means of electron capture detection
Assignee: Wilkens Instr & Res Inc
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Filing: 1963-03-01
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Granted: 1966-10-04
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Expires: 1983-03-01
Abstract
No abstract record available.
Inventors
- 👤 Keene P Dimick
- 👤 Charles H Hartmann
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 02:46
CPC Classifications
G; G01; G01N; G01N27/00; G01N27/62; G01N27/64; G01N27/66
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
200 words
A SYSTEM FOR THE DETECTION OF ELECTRONEGATIVE COMPOSITIONS COMPRISING MEANS ESTABLISHING A FLOW OF A NONELECTRONEGATIVE CARRIER GAS CONTAINING AN ELECTRONEGATIVE SOLUTE TO BE DETECTED, MEANS DEFINING A GENERALLY CYLINDRICAL SUBSTANTIALLY FLUID-TIGHT DETECTION ZONE HAVING AN INPUT OPENING ADJACENT ONE END AND AN OUTLET OPENING SPACED THEREFROM, A CYLINDRICAL SOURCE OF IONIZING RADIATION EMITTING AT LEAST ABOUT 200 MILLICURES OF RADIOACTIVE PARTICLES DISPOSED INTERIORLY OF SAID DETECTION ZONE DEFINING MEANS, CONDUIT MEANS FOR PASSING SAID FLOW OF CARRIER GAS AND SOLUTE INTO SAID INLET OPENING AND THROUGH SAID DETECTION ZONE SUBSTANTIALLY WITHOUT ATMOSPHERIC CONTAMINATION AND THEN THROUGH SAID OUTLET OPENING, MEANS CREATING AN ELECTRICAL FIELD INTERIORLY OF SAID DETECTION ZONE AND INCLUDING A FIRST CYLINDRICAL ELECTRODE IN SAID ZONE AND A SECOND OPPOSITELY CHARGED ELECTRODE IN SAID ZONE AXIALLY ALIGNED WITH SAID FIRST ELECTRODE AND SPACED ENTIRELY OUTWARDLY THEREFROM, WHEREBY RADIATION FROM SAID SOURCE IONIZES THE CARRIER GAS PASSING THROUGH THE DETECTION ZONE AND FREE ELECTRONS THEREBY PRODUCED ARE COLLECTED ON ONE OF SAID ELECTRODES TO CAUSE AN ELECTRON CURRENT, AND MEANS FOR MEASURING THE DECREASE IN SAID IONIZED CARRIER GAS ELECTRON CURRENT THAT IS CAUSED BY THE CAPTURE OF FREE ELECTRONS BY THE ELECTRO-NAGATIVE SOLUTE IN SAID CARRIER GAS.
Claim 2
Independent Claim
200 words
A SYSTEM FOR THE DETECTION OF ELECTRONEGATIVE COMPOSITIONS COMPRISING MEANS ESTABLISHING A FLOW OF A NONELECTRONEGATIVE CARRIER GAS CONTAINING AN ELECTRONEGATIVE SOLUTE TO BE DETECTED, MEANS DEFINING A GENERALLY CYLINDRICAL SUBSTANTIALLY FLUID-TIGHT DETECTION ZONE HAVING AN INPUT OPENING ADJACENT ONE END AND AN OUTLET OPENING SPACED THEREFROM, A CYLINDRICAL SOURCE OF IONIZING RADIATION EMITTING AT LEAST ABOUT 200 MILLICURES OF RADIOACTIVE PARTICLES DISPOSED INTERIORLY OF SAID DETECTION ZONE DEFINING MEANS, CONDUIT MEANS FOR PASSING SAID FLOW OF CARRIER GAS AND SOLUTE INTO SAID INLET OPENING AND THROUGH SAID DETECTION ZONE SUBSTANTIALLY WITHOUT ATMOSPHERIC CONTAMINATION AND THEN THROUGH SAID OUTLET OPENING, MEANS CREATING AN ELECTRICAL FIELD INTERIORLY OF SAID DETECTION ZONE AND INCLUDING A FIRST CYLINDRICAL ELECTRODE IN SAID ZONE AND A SECOND OPPOSITELY CHARGED ELECTRODE IN SAID ZONE AXIALLY ALIGNED WITH SAID FIRST ELECTRODE AND SPACED ENTIRELY OUTWARDLY THEREFROM, WHEREBY RADIATION FROM SAID SOURCE IONIZES THE CARRIER GAS PASSING THROUGH THE DETECTION ZONE AND FREE ELECTRONS THEREBY PRODUCED ARE COLLECTED ON ONE OF SAID ELECTRODES TO CAUSE AN ELECTRON CURRENT, AND MEANS FOR MEASURING THE DECREASE IN SAID IONIZED CARRIER GAS ELECTRON CURRENT THAT IS CAUSED BY THE CAPTURE OF FREE ELECTRONS BY THE ELECTRO-NAGATIVE SOLUTE IN SAID CARRIER GAS.
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) | 1969-10-03 | 1970-04-04 | 1970-10-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-10-03 | 1974-04-04 | 1974-10-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-10-03 | 1978-04-04 | 1978-10-04 | $7700.00 | Window Closed / Lapsed |