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US4054432A
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Polymer lined capillary column and method for producing same
Assignee: Wright State University
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Filing: 1976-06-11
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Granted: 1977-10-18
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Expires: 1996-06-11
Abstract
Abstract A polymer lined capillary column for use in gas chromotagraphy has a thin layer of ethoxycarbonyl substituted polyphenylene resin solvent deposited and uniformly coated on the interior surface of the base column as a support for a stationary phase, the resin coated column further including a separate stationary phase with the resin.
Inventors
- 👤 Paul J. Taylor
- 👤 Frank W. Harris
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 18:06
CPC Classifications
C; C08; C08L; C08L71/00; C08L71/08; C08L71/10; C08L71/12; C08L71/126; B; B01; B01J; B01J20/00; B01J20/281; B01J20/286; B01J20/30; B01J20/32; B01J20/3202; B01J20/3204; B01J20/3231; B01J20/3242; B01J20/3268; B01J20/3272; B01J20/3287; B01J20/3289; C08G; C08G65/00; C08G65/34; C08G65/38; C08G65/44; B01J2220/00; B01J2220/50; B01J2220/54; B01J2220/80; B01J2220/86
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
50 words
A polymer-lined capillary column for use in gas chromatography having a thin layer of ethoxycarbonyl substituted polyphenylene resin, solvent-deposited and uniformly coated on the interior surface of the base column as a support for a stationary phase, said resin coated column further including a separate stationary phase with said resin.
Claim 2
Dependent Claim
50 words
A polymer-lined capillary column for use in gas chromatography having a thin layer of ethoxycarbonyl substituted polyphenylene resin, solvent-deposited and uniformly coated on the interior surface of the base column as a support for a stationary phase, said resin coated column further including a separate stationary phase with said resin.
Claim 3
Dependent Claim
13 words
The polymer-lined capillary column of claim 1 wherein said base column in glass.
Claim 4
Dependent Claim
16 words
The polymer-lined capillary column of claim 2 wherein said stationary phase is intermixed with said resin.
Claim 5
Dependent Claim
19 words
The polymer-lined capillary column of claim 2 wherein said stationary phase is a second layer overlying said resin layer.
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) | 1980-10-17 | 1981-04-18 | 1981-10-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-10-17 | 1985-04-18 | 1985-10-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-10-17 | 1989-04-18 | 1989-10-18 | $7700.00 | Window Closed / Lapsed |