US3407574A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Chromatography apparatus
Assignee: CONNTINENTAL OIL Co
•
Filing: 1966-04-08
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Granted: 1968-10-29
•
Expires: 1986-04-08
Abstract
No abstract record available.
Inventors
- 👤 Jr Gerald Perkins
- 👤 Donald J Haase
- 👤 John M Crawford
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 18:08
CPC Classifications
G; G01; G01N; G01N30/00; G01N30/02; G01N30/26; G01N30/38; G01N30/50; G01N30/56; G01N30/60; G01N30/6004; G01N30/603; G01N30/6052; G01N30/6069; G01N30/6017
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US3135107A
Cited
US3146828A
Cited
US3146829A
Cited
GB1009160A
Cited
US3315736A
Cited
US3310932A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1971-10-29 | 1972-04-29 | 1972-10-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-10-29 | 1976-04-29 | 1976-10-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-10-29 | 1980-04-29 | 1980-10-29 | $7700.00 | Window Closed / Lapsed |