US3663263A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of preparing chromatographic columns
Assignee: Monsanto Co
•
Filing: 1969-04-03
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Granted: 1972-05-16
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Expires: 1989-04-03
Abstract
Abstract A method of preparing chromatographic columns of the Golay type having substrates of porous polymeric materials which comprises coating the inside surface of a tubular member with a mixture comprising one or more polymerizable monomers, at least one of which is a polyvinyl monomer, and a solvent which is miscible but nonreactive with said monomer, polymerizing the monomer or monomers and removing any unreacted components.
Inventors
- 👤 Robert J Bodre
- 👤 Kirby Allan Pinkerton
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 18:47
CPC Classifications
G; G01; G01N; G01N30/00; G01N30/02; G01N30/50; G01N30/56
Claims Analysis
Total Claims: 15
Claim 1
Independent Claim
34 words
The method of claim 1 wherein said polyvinyl monomer is selected from the group consisting of monocyclic polyvinyl aromatic hydrocarbons, heterocyclic polyvinyl aromatic hydrocarbons, polyvinyl ethers of polyhydric alcohols, glycol dimethacrylates and mixtures thereof.
Claim 2
Dependent Claim
12 words
The method of claim 2 wherein said mixture contains a free-radical catalyst.
Claim 3
Dependent Claim
24 words
The method of claim 3 wherein said polymerizing is carried out by heating said member to a temperature of from 50* to 130* C.
Claim 4
Dependent Claim
46 words
The method of claim 4 wherein a liquid washing agent is passed monocyclic said member after said water and said solvent have been removed, said agent being miscible with said solvent and said water, more volatile than said solvent and a non-solvent for the polymer formed.
Claim 5
Dependent Claim
15 words
The method of claim 5 wherein said polyvinyl monomer is a moncyclic divinyl aromatic hydrocarbon.
Claim 6
Dependent Claim
45 words
The method of claim 1 wherein said mixture contains in addition at least one liquid monoethylenically unsaturated monomer copolymerizable with said polyvinyl monomer, the ratio of the weight of said monoethylenically unsaturated monomer to the weight of said polyvinyl monomer being from 1:9 to 9:1.
Claim 7
Dependent Claim
28 words
The method of claim 7 wherein said monoethylenically unsaturated monomer is selected from the group consisting of monocyclic monovinyl aromatic hydrocarbons, monovinyl nitrogen heterocyclic compounds and mixtures thereof.
Claim 8
Dependent Claim
12 words
The method of claim 8 wherein said mixture contains a free-radical catalyst.
Claim 9
Dependent Claim
24 words
The method of claim 9 wherein said polymerizing is carried out by heating said member to a temperature of from 50* to 130* C.
Claim 10
Dependent Claim
15 words
The method of claim 10 wherein said polyvinyl monomer is a monocyclic divinyl aromatic hydrocarbon.
Claim 11
Dependent Claim
16 words
The method of claim 11 wherein said monoethylenically unsaturated monomer is a monocyclic monovinyl aromatic hydrocarbon.
Claim 12
Dependent Claim
13 words
The method of claim 12 wherein said monocyclic divinyl aromatic hydrocarbon is divinylbenzene.
Claim 13
Dependent Claim
13 words
The method of claim 13 wherein said monocyclic monovinyl aromatic hydrocarbon is styrene.
Claim 14
Dependent Claim
13 words
The method of claim 13 wherein said monocyclic monovinyl aromatic hydrocarbon is ethylvinylbenzene.
Claim 15
Dependent Claim
18 words
The method of claim 13 wherein said monocyclic monovinyl aromatic hydrocarbon is a mixture of ethylvinylbenzene and styrene.
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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) | 1975-05-16 | 1975-11-15 | 1976-05-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-05-16 | 1979-11-15 | 1980-05-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-05-16 | 1983-11-15 | 1984-05-16 | $7700.00 | Window Closed / Lapsed |