US4303529A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Multi-chromatographic materials
Assignee: United States Department of the Interior
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Filing: 1980-09-08
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Granted: 1981-12-01
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Expires: 2000-09-08
Abstract
Abstract A packing media for column chromatography having multiple separation characteristics comprises adsorbent carbon powder particles adhered to the surfaces of individual particles of a molecular size exclusion gel polymer.
Inventors
- 👤 James N. Huckins
- 👤 David L. Stalling
- 👤 Jimmie D. Petty
- 👤 Lawrence M. Smith
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 21:17
CPC Classifications
B; B01; B01J; B01J20/00; B01J20/281; B01J20/291; B01D; B01D15/00; B01D15/08; B01J20/22; B01J20/26; B01J20/261; B01J20/264; B01J20/265; B01J20/267; B01J20/28; B01J20/28014; B01J20/28016; B01J20/28019; B01J20/28047; B01J20/30; B01J20/3092; B01J20/32; B01J20/3202; B01J20/3206; B01J20/3208; B01J20/321; B01J20/3231; B01J20/3234; B01J20/324; B01J2220/00; B01J2220/50; B01J2220/54; B01J2220/58
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
56 words
A process for the one-step separation and analysis of an organic mixture containing planar and nonplanar polynuclear aromatic hydrocarbon compounds comprising passing said mixture through a chromatographic column comprising a multi-chromatographic material consisting essentially of powdered carbon adhered to the surfaces of size exclusion gel particles consisting of a cross-linked copolymer of styrene and divinyl benzene.
Claim 2
Dependent Claim
56 words
A process for the one-step separation and analysis of an organic mixture containing planar and nonplanar polynuclear aromatic hydrocarbon compounds comprising passing said mixture through a chromatographic column comprising a multi-chromatographic material consisting essentially of powdered carbon adhered to the surfaces of size exclusion gel particles consisting of a cross-linked copolymer of styrene and divinyl benzene.
Claim 3
Dependent Claim
11 words
The process of claim 1 wherein said copolymer is 3% cross-linked.
Claim 4
Dependent Claim
24 words
The process of claim 1 wherein said adhered carbon comprises up to about 5% by weight, based on the weight of said polymer particles.
Claim 5
Dependent Claim
16 words
The process of claim 1 wherein said planar polynuclear aromatic hydrocarbon compounds are planar polychlorinated biphenyls.
References Cited (Backward Citations)
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US4081402A
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US3997472A
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US4216083A
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1984-11-30 | 1985-06-01 | 1985-12-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-11-30 | 1989-06-01 | 1989-12-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-11-30 | 1993-06-01 | 1993-12-01 | $7700.00 | Window Closed / Lapsed |