Patent US3075862A successfully refreshed from Google Patents.
Patent US4119094A successfully refreshed from Google Patents.
US4119094A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Coated substrate having a low coefficient of friction hydrophilic coating and a method of making the same
Assignee: Hydromer Inc
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Filing: 1978-03-23
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Granted: 1978-10-10
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Expires: 1998-03-23
Abstract
Abstract A substrate is coated with a polyvinylpyrrolidone-polyurethane interpolymer. In the method, a polyisocyanate and a polyurethane in a solvent such as methyl ethyl ketone are applied to a substrate and the solvent evaporated. If the substrate is a polyurethane, only the polyisocyanate need be employed. Polyvinylpyrrolidone in a solvent is then applied to the treated substrate and the solvent evaporated. The invention is applied, for example, to a tube such as a catheter, a condom and a peristaltic pump tube.
Inventors
- 👤 Michael J. Micklus
- 👤 David T. Ou-Yang
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 17:46
CPC Classifications
B; B26; B26B; B26B21/00; B26B21/40; B26B21/44; B26B21/443; A; A61; A61F; A61F2/00; A61F2/02; A61F2/04; A61F2/06; A61F6/00; A61F6/02; A61F6/04; A61L; A61L29/00; A61L29/08; A61L29/085; A61L33/00; A61L33/06; A61L33/068; B05; B05D; B05D5/00; B05D5/08; C; C08; C08G; C08G18/00; C08G18/06; C08G18/28; C08G18/40; C08G18/62; C08G18/6283; C08J; C08J7/00; C08J7/04; C08J7/042; C08J7/043; C08J7/046; C08J7/056; A61M; A61M25/00; A61M25/0043; A61M25/0045; A61M2025/0046; C08J2375/00; C08J2375/04; C08J2439/00; C08J2439/04; C08J2439/06; C08J2475/00; C08J2475/04; Y; Y10; Y10S; Y10S528/00; Y10S528/904; Y10S623/00; Y10S623/924; Y10T; Y10T428/00; Y10T428/13; Y10T428/1352; Y10T428/1386; Y10T428/139; Y10T428/1393; Y10T428/31504; Y10T428/31536; Y10T428/31551; Y10T428/31554; Y10T428/31565; Y10T428/31569; Y10T428/31573; Y10T428/3158; Y10T428/31587; Y10T428/31786; Y10T428/31826; Y10T428/31855; Y10T428/31931; Y10T428/31935
Claims Analysis
Total Claims: 15
Claim 1
Independent Claim
38 words
An article having a very low coefficient of friction when wetting with a water base liquid or a lower aliphatic alcohol comprising: a substrate to which conventional polyurethanes adhere, and a cured polyvinylpyrollidone-polyurethane interpolymer coating on said substrate.
Claim 2
Dependent Claim
38 words
An article having a very low coefficient of friction when wetting with a water base liquid or a lower aliphatic alcohol comprising: a substrate to which conventional polyurethanes adhere, and a cured polyvinylpyrollidone-polyurethane interpolymer coating on said substrate.
Claim 3
Dependent Claim
14 words
An article in accordance with claim 1 in which the substrate is of polyurethane.
Claim 4
Dependent Claim
24 words
An article in accordance with claim 1 in which the substrate is of a material other than polyurethane coated with a film of polyurethane.
Claim 5
Dependent Claim
11 words
An article in accordance with claim 1 having a polyvinylchloride substrate.
Claim 6
Dependent Claim
12 words
An article in accordance with claim 1 having a rubber latex substrate.
Claim 7
Dependent Claim
11 words
An article in accordance with claim 1 having a polyisoprene substrate.
Claim 8
Dependent Claim
12 words
An article in accordance with claim 1 having a polyester resin substrate.
Claim 9
Dependent Claim
46 words
A condom having a base material of polyurethane, and a cured coating of a polyvinylpyrollidone-polyurethane interpolymer on the outside of said base material wherein said coated condom has a very low coefficient of friction when wetted with a water base liquid or a lower aliphatic alcohol.
Claim 10
Dependent Claim
46 words
A condom having a base material of polyurethane, and a cured coating of a polyvinylpyrollidone-polyurethane interpolymer on the outside of said base material wherein said coated condom has a very low coefficient of friction when wetted with a water base liquid or a lower aliphatic alcohol.
Claim 11
Dependent Claim
34 words
A resilient tube which conventional polyurethanes adhere coated with a cured polyvinylpyrollidonepolyurethane interpolymer to provide the tube with a surface having a very low coefficient of friction when wetted with a water base liquid.
Claim 12
Dependent Claim
34 words
A resilient tube which conventional polyurethanes adhere coated with a cured polyvinylpyrollidonepolyurethane interpolymer to provide the tube with a surface having a very low coefficient of friction when wetted with a water base liquid.
Claim 13
Dependent Claim
15 words
A device in accordance with claim 9 in which the tube is of rubber latex.
Claim 14
Dependent Claim
52 words
A catheter having a tubular body which conventional polyurethanes adhere, and a cured coating of polyvinylpyrollidone-polyurethane interpolymer on the outside of said body providing the outer surface of said body with a coating having a very low coefficient of friction when wetted with a water base liquid or a lower aliphatic alcohol.
Claim 15
Dependent Claim
52 words
A catheter having a tubular body which conventional polyurethanes adhere, and a cured coating of polyvinylpyrollidone-polyurethane interpolymer on the outside of said body providing the outer surface of said body with a coating having a very low coefficient of friction when wetted with a water base liquid or a lower aliphatic alcohol.
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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) | 1981-10-09 | 1982-04-10 | 1982-10-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-10-09 | 1986-04-10 | 1986-10-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-10-09 | 1990-04-10 | 1990-10-10 | $7700.00 | Window Closed / Lapsed |