US3346341A
Expired / Lapsed
US
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Fragmentation inlet for gas chromatography and method of loading a sample thereinto
Assignee: Beckman Coulter Inc
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Filing: 1965-06-28
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Granted: 1967-10-10
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Expires: 1985-06-28
Abstract
No abstract record available.
Inventors
- 👤 James C Sternberg
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 15:08
CPC Classifications
G; G01; G01N; G01N30/00; G01N30/02; G01N30/04; G01N30/06
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
97 words
A METHOD OF LOADING A SAMPLE IN A FRAGMENTATION INLET SAMPLE TUBE FOR GAS CHROMATOGRAPHY COMPRISING THE STEPS OF: ROTATING THE UPSTREAM END OF AN ALUMINA SAMPLE TUBE AGAINST A SHEET OF GRAPHITE FELT TO CUT OUT A POROUS CONDUCTING PLUG THE SIZE OF THE TUBE; PLACING A SAMPLE ON THE UPSTREAM END OT THE PLUG; PLACING A LAYER OF SILICA WOOL ON TOP OF THE SAMPLE; INSERTING A DOWNSTREAM ELECTRODE IN THE DOWNSTREAM END OF THE TUBE; PUSHING THE PLUG AGAINST THE DOWNSTREAM ELECTRODE; AND PLACING AN UPSTREAM ELECTRODE IN THE UPSTREAM END OF THE TUBE.
Claim 2
Independent Claim
97 words
A METHOD OF LOADING A SAMPLE IN A FRAGMENTATION INLET SAMPLE TUBE FOR GAS CHROMATOGRAPHY COMPRISING THE STEPS OF: ROTATING THE UPSTREAM END OF AN ALUMINA SAMPLE TUBE AGAINST A SHEET OF GRAPHITE FELT TO CUT OUT A POROUS CONDUCTING PLUG THE SIZE OF THE TUBE; PLACING A SAMPLE ON THE UPSTREAM END OT THE PLUG; PLACING A LAYER OF SILICA WOOL ON TOP OF THE SAMPLE; INSERTING A DOWNSTREAM ELECTRODE IN THE DOWNSTREAM END OF THE TUBE; PUSHING THE PLUG AGAINST THE DOWNSTREAM ELECTRODE; AND PLACING AN UPSTREAM ELECTRODE IN THE UPSTREAM END OF THE TUBE.
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) | 1970-10-09 | 1971-04-10 | 1971-10-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-10-09 | 1975-04-10 | 1975-10-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-10-09 | 1979-04-10 | 1979-10-10 | $7700.00 | Window Closed / Lapsed |