Patent US3822530A successfully refreshed from Google Patents.
US3822530A
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Chromatographic column packing
Assignee: Applied Automation Inc
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Filing: 1971-11-08
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Granted: 1974-07-09
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Expires: 1991-11-08
Abstract
Abstract A chromatographic column packing comprising a polymeric film on a support, the formation of the polymer and its deposition on the support being made in situ.
Inventors
- 👤 E Fuller
- 👤 M Bartholomew
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 14:28
CPC Classifications
B; B01; B01J; B01J20/00; B01J20/30; B01J20/32; B01J20/3202; B01J20/3204; B01J20/281; B01J20/286; B01J20/3206; B01J20/3208; B01J20/3231; B01J20/3242; B01J20/3268; B01J20/327; B01J2220/00; B01J2220/50; B01J2220/54
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
50 words
The method of claim 1 in which said monomer is selected from the group consisting of divinylbenzene, divinyltoluene, divinylxylene and ethylene glycol dimethylacrylate, said monomer being polymerized with a monoethylenically unsaturated monomer selected from the group consisting of monocyclic monovinyl aromatic hydrocarbons, 4-vinylpyridine, 2-vinylpyridine, 3-vinylpyridine, N-vinylpyrrolidone, acrylonitrile and methyl methacrylate.
Claim 2
Dependent Claim
26 words
The method of claim 1 in which said polymer is deposited on said support in an amount up to about 50 weight percent of said support.
Claim 3
Dependent Claim
23 words
The method of claim 1 in which said solution comprises a solvent selected from the group consisting of aliphatic hydrocarbons and higher alcohols.
Claim 4
Independent Claim
75 words
A method of preparing a chromatographic analysis column for aNalysis which comprises producing a packing suitable for chromatographic analysis which comprises forming in situ on a particulate support a polymer from at least one difunctional monomer in contact and admixed with a solvent and a particulate support, causing at least a portion of said polymer to be deposited as formed on said particulate support, removing the solvent and recovering said packing comprising a supported polymer.
Claim 5
Dependent Claim
25 words
The method of claim 5 in which said polymer is formed at a dilution ratio within the range of from about 1.5 to about 15.
Claim 6
Dependent Claim
10 words
An article of manufacture comprising a packing of claim 5.
Claim 7
Dependent Claim
9 words
A chromatographic column containing the packing of claim 7.
Claim 8
Dependent Claim
9 words
A chromatographic column containing the packing of claim 5.
Claim 9
Independent Claim
96 words
A method of preparing a chromatographic analysis column for analysis which comprises producing a packing suitable for chromatographic analysis which comprises forming in situ on a particulate support a polymer from at least one difunctional monomer in contact and admixed with a solvent and a particulate support, causing at least a portion of said polymer to be deposited as formed on said particulate support, removing the solvent and recovering said packing comprising a supported polymer; wherein said polymer comprises up to about 50 weight percent and wherein the thus supported polymer is placed into said column.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-07-08 | 1978-01-07 | 1978-07-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-07-08 | 1982-01-07 | 1982-07-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-07-08 | 1986-01-07 | 1986-07-09 | $7700.00 | Window Closed / Lapsed |