Patent US3518874A successfully refreshed from Google Patents.
US3518874A
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US
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Apparatus for analyzing mixtures of substances in one or a plurality of chromatographic columns
Assignee: Czech Academy of Sciences
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Filing: 1965-04-28
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Granted: 1970-07-07
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Expires: 1985-04-28
Abstract
No abstract record available.
Inventors
- 👤 Jiri Hrdina
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 22:48
CPC Classifications
G; G01; G01N; G01N30/00; G01N30/02; G01N30/26; G01N30/38; G01N30/46; G01N30/466; G01N30/04; G01N30/24; G01N30/28; G01N30/34
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US3166929A
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US3220246A
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US3230048A
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US3422271A
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US3294490A
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US3375080A
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US3373872A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-07-06 | 1974-01-05 | 1974-07-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-07-06 | 1978-01-05 | 1978-07-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-07-06 | 1982-01-05 | 1982-07-07 | $7700.00 | Window Closed / Lapsed |