Patent US3422604A successfully refreshed from Google Patents.
US3422604A
Expired / Lapsed
US
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Chromatography apparatus
Assignee: ConocoPhillips Co
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Filing: 1966-02-21
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Granted: 1969-01-21
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Expires: 1986-02-21
Abstract
No abstract record available.
Inventors
- 👤 Donald J Haase
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 22:55
CPC Classifications
G; G01; G01N; G01N30/00; G01N30/02; G01N30/26; G01N30/38; G01N30/60; G01N30/6004; G01N30/6017; G01N30/603; G01N30/6052; G01N30/6069
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2989443A
Cited
US3146616A
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US3135108A
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US3230167A
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US3250058A
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US3315736A
Cited
US3310932A
Cited
US3298527A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-01-21 | 1972-07-22 | 1973-01-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-01-21 | 1976-07-22 | 1977-01-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-01-21 | 1980-07-22 | 1981-01-21 | $7700.00 | Window Closed / Lapsed |