Patent US3267647A successfully refreshed from Google Patents.
US3267647A
Expired / Lapsed
US
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Vapor phase chromatography system
Assignee: ConocoPhillips Co
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Filing: 1963-07-15
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Granted: 1966-08-23
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Expires: 1983-07-15
Abstract
No abstract record available.
Inventors
- 👤 Alfred B Carel
- 👤 George A Brown
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 11:19
CPC Classifications
G; G01; G01N; G01N30/00; G01N30/02; G01N30/60; G01N30/6004; G01N30/6017
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
62 words
A VAPOR PHASE CHROMATOGRAPHY SYSTEM COMPRISING: (A) AN ANNULAR COLUMN HAVING TWO CONCENTRIC CYLINDRICAL WALLS DEFINING AN ANNULAR SPACE THEREBETWEEN; (B) MEANS INCLUDING A PLURALITY OF PIPES IN FIXED RELATIONSHIP TO SAID ANNULAR COLUMN FOR SIMULTANEOUSLY INTRODUCING SUBSTANTIALLY EQUAL QUANTITIES OF A GASEOUS SAMPLE TO ONE END OF THE COLUMN AT A PLURALITY OF POINTS SPACED CIRCUMFERENTIALLY AROUND SAID ANNULAR SPACE; AND
Claim 2
Dependent Claim
62 words
A VAPOR PHASE CHROMATOGRAPHY SYSTEM COMPRISING: (A) AN ANNULAR COLUMN HAVING TWO CONCENTRIC CYLINDRICAL WALLS DEFINING AN ANNULAR SPACE THEREBETWEEN; (B) MEANS INCLUDING A PLURALITY OF PIPES IN FIXED RELATIONSHIP TO SAID ANNULAR COLUMN FOR SIMULTANEOUSLY INTRODUCING SUBSTANTIALLY EQUAL QUANTITIES OF A GASEOUS SAMPLE TO ONE END OF THE COLUMN AT A PLURALITY OF POINTS SPACED CIRCUMFERENTIALLY AROUND SAID ANNULAR SPACE; AND
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) | 1969-08-22 | 1970-02-21 | 1970-08-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-08-22 | 1974-02-21 | 1974-08-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-08-22 | 1978-02-21 | 1978-08-23 | $7700.00 | Window Closed / Lapsed |