US3928294A
Expired / Lapsed
US
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Biocompatible articles including polymeric membranes having high permeability to gases and uses thereof
Assignee: OI Glass Inc
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Filing: 1973-02-02
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Granted: 1975-12-23
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Expires: 1993-02-02
Abstract
Abstract There is disclosed the preparation of an alpha-olefin-sulfur dioxide copolymer derived from the C8 to C18 alpha-olefins. The polymers undergo clean thermal degradation, have high permeabilities to oxygen and carbon dioxide, and are readily processed into a membrane article. Maximum permeabilities are obtained with the C16 based polymer. New uses of the copolymer are set forth including perfusion membranes, soft contact lenses and biocompatible articles for contact with human body fluids including surgical tubing, wound dressings, and prosthetic devices such as artificial veins, arteries and heart valves.
Inventors
- 👤 James E Crawford
- 👤 Don N Gray
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 20:16
CPC Classifications
B; B01; B01D; B01D71/00; B01D71/06; B01D71/66; B01D71/68; A; A61; A61F; A61F13/00; A61F13/01; A61F13/01008; A61F13/01034; A61F2/00; A61F2/02; A61F2/24; A61F2/2421; A61L; A61L15/00; A61L15/16; A61L15/22; A61L15/26; A61L27/00; A61L27/14; A61L27/18; A61L33/00; A61L33/06; A61L33/068; B01D69/00; B01D69/02; C; C08; C08G; C08G75/00; C08G75/20; C08G75/205; C08G75/22; A61F2013/00089; A61F2013/00217; A61F13/15; A61F2013/15008; A61F2013/15048; A61M; A61M60/00; A61M60/10; A61M60/122; A61M60/196; Y; Y10; Y10S; Y10S128/00; Y10S128/24
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
39 words
AS AN ARTICLE OF MANUFACTURE, A PERSELCTIVE, BIOCOMPATIBLE MEMBRANE ARTICLE HAVING HIGH GASEOUS PERMEABILITY, SAID MEMBRANE CONSISTING OF A POLY(ALPHA-OLEFIN-SULFONE) DERIVED FROM THE SERIES C8 TO C18 ALPHA-OLEFINS AND SULFUR DIOXIDE THE MEMBRANE HAVING AN OXYGEN TRANSMISSION RATE OF
Claim 2
Dependent Claim
39 words
AS AN ARTICLE OF MANUFACTURE, A PERSELCTIVE, BIOCOMPATIBLE MEMBRANE ARTICLE HAVING HIGH GASEOUS PERMEABILITY, SAID MEMBRANE CONSISTING OF A POLY(ALPHA-OLEFIN-SULFONE) DERIVED FROM THE SERIES C8 TO C18 ALPHA-OLEFINS AND SULFUR DIOXIDE THE MEMBRANE HAVING AN OXYGEN TRANSMISSION RATE OF
Claim 3
Dependent Claim
21 words
An article as defined in claim 1 wherein the radical contains fourteen carbon atoms and the alpha-olefin contains sixteen carbon atoms.
Claim 4
Dependent Claim
15 words
An article as defined in claim 1 in which the alpha-olefin contains 14 carbon atoms.
Claim 5
Dependent Claim
60 words
An poly(alpha-olefin-sulfone) as defined in claim 1 in which the permeability to oxygen is measured by an O2 transmission rate of at least about 3.1 X 10 4 cc mil./in2 yr atm; the permeability to CO2 is at least about 13.9 X 10 4 cc mil./in2 yr atm; and the percent elongation at yield point is at least about 13.5.
Claim 6
Dependent Claim
47 words
A membrane article as defined in claim 1 that has an O2 transmission rate of about 3.75 X 10 4 cc mil./in2 yr atm; a CO2 transmission rate of about 16.5 X 10 4 cc mil./in2 yr atm; and an elongation at yield point of about 14%.
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) | 1978-12-22 | 1979-06-23 | 1979-12-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-12-22 | 1983-06-23 | 1983-12-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-12-22 | 1987-06-23 | 1987-12-23 | $7700.00 | Window Closed / Lapsed |