US3514262A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Chromatographic separation method
Assignee: Phillips Petroleum Co
•
Filing: 1967-08-29
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Granted: 1970-05-26
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Expires: 1987-08-29
Abstract
No abstract record available.
Inventors
- 👤 Buell O Ayers
- 👤 Francis W Karasek
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 14:56
CPC Classifications
G; G01; G01N; G01N30/00; G01N30/02; G01N30/26; G01N30/38; G01N30/42; Y; Y10; Y10T; Y10T436/00; Y10T436/12; Y10T436/21
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US3096157A
Cited
US3435659A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-05-25 | 1973-11-24 | 1974-05-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-05-25 | 1977-11-24 | 1978-05-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-05-25 | 1981-11-24 | 1982-05-26 | $7700.00 | Window Closed / Lapsed |