US3725260A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Separation of pesticides from lipids by gel permeation chromatography
Assignee: INTERIOR
•
Filing: 1971-12-28
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Granted: 1973-04-03
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Expires: 1991-12-28
Abstract
Abstract CYCLOHEXANE ALSO SERVING AS SOLVENT FOR ELUTON OF THE SAMPLE. CLEANUP OF LIPID SAMPLES, FOR SUBSEQUENT ANALYSIS OF PESTICIDE CONTENT, IS ACCOMPLISHED BY MEANS OF GEL PERMEATION CHROMATOGRAPHY. THE GEL EMPLOYED COMPRISES A STYRENE-DIVINYLBENZENE COPOLYMER AND CYCLOHEXANE, WITH
Inventors
- 👤 D Stalling
- 👤 R Tindle
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 22:17
CPC Classifications
B; B01; B01J; B01J20/00; B01J20/22; Y; Y10; Y10T; Y10T436/00; Y10T436/25; Y10T436/25375; Y10T436/255
Claims Analysis
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-04-02 | 1976-10-02 | 1977-04-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-04-02 | 1980-10-02 | 1981-04-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-04-02 | 1984-10-02 | 1985-04-03 | $7700.00 | Window Closed / Lapsed |