US3361908A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method and apparatus for electron attachment detection
Assignee: Tracor Instruments Austin Inc
•
Filing: 1964-01-03
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Granted: 1968-01-02
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Expires: 1984-01-03
Abstract
No abstract record available.
Inventors
- 👤 Donald L Petitjean
- 👤 Dale R Rushneck
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 16:34
CPC Classifications
G; G01; G01N; G01N27/00; G01N27/62
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
112 words
AN IONIZATION DETECTOR CELL FOR USE IN GAS CHROMATOGRAPHY COMPRISING A CYLINDER OF INSULATING MATERIAL, A PERFORATED RADIOACTIVE ELECTRICALLY CONDUCING SHEET COVERING ONE END OF THE CYLINDER, AN ELECTRICALLY CONDUCTING PISTON HAVING AN END FACE PARALLEL TO SAID SHEET IN THE CYLINDER, A GAS-TIGHT SEAL BETWEEN THE PISTON AND THE CYLINDER, MEANS FOR ADJUSTING THE SPACING OF THE PISTON FROM THE SHEET TO PROVIDE AN ADJUSTABLE VOLUME CHAMBER, FIRST MEANS FOR INTRODUCING A CHROMATOGRAPH COLUMN EFFUENT INTO SAID CHAMBER, SECOND MEANS FOR PASSING THE EFFUENT FROM THE CHAMBER, SAID PERFORATED SHEET PROVIDING ONE OF THE FIRST AND SECOND MEANS, A PASSAGEWAY THROUGH THE PISTON DEFINING THE OTHER OF SAID FIRST AND SECOND
Claim 2
Dependent Claim
112 words
AN IONIZATION DETECTOR CELL FOR USE IN GAS CHROMATOGRAPHY COMPRISING A CYLINDER OF INSULATING MATERIAL, A PERFORATED RADIOACTIVE ELECTRICALLY CONDUCING SHEET COVERING ONE END OF THE CYLINDER, AN ELECTRICALLY CONDUCTING PISTON HAVING AN END FACE PARALLEL TO SAID SHEET IN THE CYLINDER, A GAS-TIGHT SEAL BETWEEN THE PISTON AND THE CYLINDER, MEANS FOR ADJUSTING THE SPACING OF THE PISTON FROM THE SHEET TO PROVIDE AN ADJUSTABLE VOLUME CHAMBER, FIRST MEANS FOR INTRODUCING A CHROMATOGRAPH COLUMN EFFUENT INTO SAID CHAMBER, SECOND MEANS FOR PASSING THE EFFUENT FROM THE CHAMBER, SAID PERFORATED SHEET PROVIDING ONE OF THE FIRST AND SECOND MEANS, A PASSAGEWAY THROUGH THE PISTON DEFINING THE OTHER OF SAID FIRST AND SECOND
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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) | 1971-01-01 | 1971-07-03 | 1972-01-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-01-01 | 1975-07-03 | 1976-01-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-01-01 | 1979-07-03 | 1980-01-02 | $7700.00 | Window Closed / Lapsed |