Patent US4575476A successfully refreshed from Google Patents.
US4575476A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Dipped rubber article
Assignee: LRC Products Ltd
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Filing: 1983-11-28
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Granted: 1986-03-11
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Expires: 2003-11-28
Abstract
Abstract A skin-contacting lubricating layer formed from a hydrogel polymer bonded to a rubber article (such as a surgeon's glove) is treated by means of surfactant material (such as a bactericidal cationic surfactant which preferably has a 6-18C alkyl or alkenyl group, such as an N-hexadecyl group) or a long chain fatty amine so as to substantially improve the lubricity of the layer with respect to damp skin. The hydrogel polymer is preferably a copolymer of 2-hydroxyethylmethacrylate (HEMA) with methacrylic acid (MAA) or with 2-ethylhexyl acrylate (EHA) or with both MAA and EHA. Such a hydrogel polymer has improved lubricity to dry skin and, if used for this purpose, need not be treated with a surfactant or fatty amine to improve the lubricity with respect to damp skin.
Inventors
- 👤 Howard I. Podell
- 👤 Albert Goldstein
- 👤 David C. Blackley
- 👤 Michael H. James
- 👤 David M. Bratby
- 👤 Roger Duck
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 02:29
CPC Classifications
B; B29; B29C; B29C41/00; B29C41/02; B29C41/14; A; A61; A61B; A61B42/00; A61B42/10; C; C08; C08K; C08K5/00; C08K5/0008; C08K5/0075; B29K; B29K2021/00; Y; Y10; Y10T; Y10T428/00; Y10T428/13; Y10T428/1334; Y10T428/1352; Y10T428/1386; Y10T428/31504; Y10T428/31678; Y10T428/31692; Y10T428/31696; Y10T428/31826; Y10T428/31833; Y10T428/31855; Y10T428/31909; Y10T428/31928; Y10T428/31931
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
82 words
A flexible rubber article having a lubricating layer formed from a hydrogel polymer bonded thereto so as to provide a skin-contacting surface of said article in which a member of the group consisting of surfactant materials and long chain fatty amines has been applied to said skin-contacting surface so as to substantially improve the lubricity of said surface with respect to damp skin, said hydrogel polymer being a copolymer of 2-hydroxyethyl methacrylate with at least one of methacrylic acid and 2-ethylhexyl acrylate.
Claim 2
Dependent Claim
82 words
A flexible rubber article having a lubricating layer formed from a hydrogel polymer bonded thereto so as to provide a skin-contacting surface of said article in which a member of the group consisting of surfactant materials and long chain fatty amines has been applied to said skin-contacting surface so as to substantially improve the lubricity of said surface with respect to damp skin, said hydrogel polymer being a copolymer of 2-hydroxyethyl methacrylate with at least one of methacrylic acid and 2-ethylhexyl acrylate.
Claim 3
Dependent Claim
15 words
An article according to claim 1, in which the surfactant material comprises an ionic surfactant.
Claim 4
Dependent Claim
12 words
An article according to claim 2, in which said surfactant is cationic.
Claim 5
Dependent Claim
23 words
An article according to claim 3, in which said surfactant is a quaternary ammonium compound having at least one 6-18 C hydrocarbyl group.
Claim 6
Dependent Claim
25 words
An article according to claim 4, in which said hydrocarbyl group is attached to a quaternary nitrogen atom which is part of a heterocyclic ring.
Claim 7
Dependent Claim
16 words
An article according to claim 5, in which the heterocyclic ring is pyridine, morpholine or imidazoline.
Claim 8
Dependent Claim
23 words
An article according to claim 6, in which the surfactant is an N-lauryl or N-cetyl pyridinium salt, or a hydroxyethyl heptadecenyl imidazoline salt.
Claim 9
Dependent Claim
15 words
An article according to claim 4, in which said surfactant is hexadecyl trimethyl ammonium chloride.
Claim 10
Dependent Claim
36 words
An article according to any one of claims 1 and 2-8 in which the copolymer has a composition within from 25 to 95% 2-hydroxyethylmethacrylate, from 5 to 75% methacrylic acid and from zero to 40% 2-ethylhexylacrylate.
Claim 11
Dependent Claim
29 words
An article according to claim 1, said copolymer having a composition within from zero to 50% 2-ethylhexylacrylate, from zero to 70% methacrylic acid and from 10 to 95% 2-hydroxyethylmethacrylate.
Claim 12
Dependent Claim
30 words
An article according to claim 10, said copolymer having a composition within from 5 to 35% 2-ethylhexylacrylate, from 15 to 70% methacrylic acid and from 30 to 85% 2-hydroxyethyl methacrylate.
Claim 13
Dependent Claim
35 words
An article according to claim 1, the lubricating layer having been formed by applying a solution of said polymer to said article prior to complete vulcanization thereof and curing the polymer and vulcanizing the rubber.
Claim 14
Dependent Claim
14 words
An article according to claim 12, in which said solution is applied by dipping.
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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) | 1989-03-10 | 1989-09-09 | 1990-03-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1993-03-10 | 1993-09-09 | 1994-03-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1997-03-10 | 1997-09-09 | 1998-03-11 | $7700.00 | Window Closed / Lapsed |