US5155144A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Polysaccharide-based porous sheets
Assignee: FMC Corp
•
Filing: 1990-10-29
•
Granted: 1992-10-13
•
Expires: 2010-10-29
Abstract
Abstract A microporous sheet comprising a polymeric matrix having a liquid insoluble, particulate, activated polysaccharide media dispersed therein; use of the sheet in affinity chromatography or ion-exchange chromatography or as a biochemical reactor or battery separator; processes for manufacturing the sheet; apparatus containing the microporous sheet as its active element; and methods for using such sheet.
Inventors
- 👤 James L. Manganaro
- 👤 Bruce S. Goldberg
- 👤 George E. Raynor, Jr.
- 👤 Charles A. Gray
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 10:17
CPC Classifications
B; B01; B01J; B01J20/00; B01J20/28; B01J20/28014; B01J20/28026; B01D; B01D15/00; B01D15/08; B01J20/28033; B01J20/28054; B01J20/28078; B01J20/28085; C; C08; C08J; C08J9/00; C08J9/26; C08J9/28; H; H01; H01M; H01M50/00; H01M50/40; H01M50/403; H01M50/409; H01M50/411; H01M50/414; H01M50/429; B01D15/26; B01D15/36; B01D15/361; B01D15/38; B01D15/3804; C08J2201/00; C08J2201/04; C08J2201/054; Y; Y02; Y02E; Y02E60/00; Y02E60/10
Claims Analysis
Total Claims: 23
Claim 1
Independent Claim
57 words
A sheet article of manufacture having a network of pores throughout formed from (1) a polymeric resinous matrix and (2) a particulate, releasably-binding, liquid-media insoluble, activated polysaccharide selected from the group consisting of agar, agarose, alginate, carrageenan, cellulose, chitosan, konjac, and mixtures thereof fixedly dispersed throughout said matrix, wherein said pores allow access to the activated polysaccharide.
Claim 2
Dependent Claim
57 words
A sheet article of manufacture having a network of pores throughout formed from (1) a polymeric resinous matrix and (2) a particulate, releasably-binding, liquid-media insoluble, activated polysaccharide selected from the group consisting of agar, agarose, alginate, carrageenan, cellulose, chitosan, konjac, and mixtures thereof fixedly dispersed throughout said matrix, wherein said pores allow access to the activated polysaccharide.
Claim 3
Dependent Claim
13 words
The composition of claim 1 wherein the polymeric resin is a thermoplastic resin.
Claim 4
Dependent Claim
14 words
The composition of claim 1 wherein the activated polysaccharide contains ion exchange chromatography sites.
Claim 5
Dependent Claim
13 words
The composition of claim 1 wherein the activated polysaccharide contains affinity chromatography sites.
Claim 6
Dependent Claim
18 words
The composition of claim 1 wherein the activated polysaccharide contains sites capable of binding biological materials or organisms.
Claim 7
Dependent Claim
16 words
The composition of claim 1 wherein the polysaccharide is an activated cellulose, agarose, or mixtures thereof.
Claim 8
Dependent Claim
11 words
The composition of claim 6 wherein the polysaccharide is diethylaminoethyl cellulose.
Claim 9
Dependent Claim
12 words
The composition of claim 6 wherein the polysaccharide is cross-linked diethylaminoethyl agarose.
Claim 10
Dependent Claim
19 words
The composition of claim 1 wherein the weight ratio of activated polysaccharide to matrix comprises about 0.3:1 to 3:1.
Claim 11
Dependent Claim
17 words
The composition of claim 1 wherein the pores average about from 1 to 40 microns in diameter.
Claim 12
Dependent Claim
17 words
The composition of claim 1 wherein the pores average about from 10 to 30 microns in diameter.
Claim 13
Dependent Claim
29 words
The composition of claim 1 wherein the resinous matrix is formed from at least one polyvinyl chloride resin, polyvinyl chloride/monoethylenic monomer copolymer, polyolefin, polysulfone, latex, or water-insoluble cellulose ester.
Claim 14
Dependent Claim
18 words
The composition of claim 1 wherein the polysaccharide is at least one activated carrageenan, alginate, chitosan, or konjac.
Claim 15
Dependent Claim
18 words
The sheet of claim 1 adapted for use as a battery separator in separating electrodes in storage batteries.
Claim 16
Dependent Claim
101 words
A process for the preparation of a sheet according to claim 1 comprising: a. mixing: (i) a matrix-forming material which is a polymeric resin, (ii) a solvent or dispersant for said polymeric resin; (iii) a media-forming material which is a particulate, releasably-binding, carrier liquid insoluble, activated polysaccharide, and (iv) a volatile non-solvent pore former; b. extruding or molding the mixture to form a substantially flattened sheet; c. passing the flattened sheet through an extraction medium to replace the solvent in the sheet, when present, with the extraction medium; and d. removing the extraction medium and non-solvent pore former from the sheet.
Claim 17
Dependent Claim
17 words
The process of claim 15 wherein the matrix-forming material is a latex and said dispersant is water.
Claim 18
Dependent Claim
14 words
The process of claim 15 wherein the matrix-forming material is plasticized in said solvent.
Claim 19
Dependent Claim
18 words
The process of claim 17 wherein the weight ratio of solvent to resin comprises from 1:1 to 3:1.
Claim 20
Dependent Claim
18 words
The process of claim 15 wherein the weight ratio of media to matrix is about 0.3:1 to 3:1.
Claim 21
Dependent Claim
22 words
The process of claim 15 wherein the polysaccharide is an activated: agar, agarose, alginate, carrageenan, cellulose, chitosan, konjac, or a mixture thereof.
Claim 22
Dependent Claim
27 words
The process of claim 15 wherein the polymeric resin is at least one polyvinyl chloride resin, polyvinyl chloride/monoethylenic monomer copolymer, polyolefin, polysulfone, latex, or water-insoluble cellulose ester.
Claim 23
Dependent Claim
20 words
The process of claim 16 wherein the mixing is carried out in the added presence of an alkali metal carbonate.
References Cited (Backward Citations)
US1132183A
Cited
US1567747A
Cited
US2112529A
Cited
GB601506A
Cited
US2624768A
Cited
US3766106A
Cited
US4076656A
Cited
US3862030A
Cited
US3922432A
Cited
US4102746A
Cited
US4169014A
Cited
GB1600241A
Cited
US4385991A
Cited
US4585797A
Cited
US4373519A
Cited
US4460642A
Cited
US4565663A
Cited
US4663163A
Cited
US4743373A
Cited
US4722898A
Cited
USRE33093E
Cited
US4705809A
Cited
US4957943A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1995-10-13 | 1996-04-13 | 1996-10-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1999-10-13 | 2000-04-13 | 2000-10-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2003-10-13 | 2004-04-13 | 2004-10-13 | $7700.00 | Window Closed / Lapsed |