US3511029A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method and apparatus for chromatography sample preparation
Assignee: ConocoPhillips Co
•
Filing: 1969-07-08
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Granted: 1970-05-12
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Expires: 1989-07-08
Abstract
No abstract record available.
Inventors
- 👤 Leo V Azarraga
- 👤 Orville F Folmer Jr
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 13:52
CPC Classifications
G; G01; G01N; G01N30/00; G01N30/02; G01N30/04; G01N30/06; G01N30/12; H; H01; H01S; H01S3/00; H01S3/0007
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US3057692A
Cited
US3389538A
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 |