Patent US3511028A successfully refreshed from Google Patents.
US3511028A
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Continuous gas-liquid chromatography method utilizing annular open columns
Assignee: COMMERCE USA
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Filing: 1969-01-15
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Granted: 1970-05-12
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Expires: 1989-01-15
Abstract
No abstract record available.
Inventors
- 👤 Charles Proffer Saylor
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 17:50
CPC Classifications
G; G01; G01N; G01N30/00; G01N30/02; G01N30/60; G01N30/6004; G01N30/6017; G01N30/26; G01N30/38; G01N30/6052; G01N2030/022; G01N2030/025; G01N30/50; G01N30/58
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US3038326A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-05-11 | 1973-11-10 | 1974-05-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-05-11 | 1977-11-10 | 1978-05-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-05-11 | 1981-11-10 | 1982-05-12 | $7700.00 | Window Closed / Lapsed |