Patent US5441488A successfully refreshed from Google Patents.
US5441488A
Expired / Lapsed
US
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Medical tool having lubricious surface in a wetted state and method for production thereof
Assignee: Terumo Corp
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Filing: 1994-02-07
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Granted: 1995-08-15
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Expires: 2014-02-07
Abstract
Abstract This invention provides a medical tool the surface of which is enabled to acquire lasting lubricity (low friction) by assuming a state wetted with bodily fluid or aqueous solution. This surface is formed without requiring the coating work to be repeated. The medical tool is produced by coating a water-swellable polymer having in the molecular unit thereof a reactive functional group capable of being reacted with a proton-donating group, on the surface of a matric material possessing the proton-donating group, and also by coating a water-swellable polymer having in the molecular unit thereof a reactive group capable of being reacted with an acid anhydride group on the surface of a matric material possessing the acid anhydride group.
Inventors
- 👤 Kenichi Shimura
- 👤 Naoki Ishii
- 👤 Makoto Onishi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 06:43
CPC Classifications
A; A61; A61M; A61M25/00; A61M25/10; A61M25/1027; A61L; A61L27/00; A61L27/28; A61L27/34; A61L29/00; A61L29/08; A61L29/085; A61L29/14; A61L31/00; A61L31/08; A61L31/10; A61M25/0043; A61M25/0045; A61M2025/0046; A61M2025/1043; A61M2025/1088
Claims Analysis
Total Claims: 20
Claim 1
Independent Claim
106 words
A medical tool comprising: a water-swellable polymer comprising a moiety manifesting lubricity and another moiety having a first reactive functional group selected from the group consisting of an epoxy group, an acid halide group, and an isocyanate group in the molecular unit thereof; and a material, chemically bonded to said water-swellable polymer by means of a proton-donating group of said material, capable of reacting with said first reactive functional group, said proton-donating group selected from the group consisting of an amino group, an imino group, a hydroxy group, a carboxyl group, a mercapto group, or mixtures thereof; said medical tool exhibiting lubricity in a wetted state.
Claim 2
Dependent Claim
106 words
A medical tool comprising: a water-swellable polymer comprising a moiety manifesting lubricity and another moiety having a first reactive functional group selected from the group consisting of an epoxy group, an acid halide group, and an isocyanate group in the molecular unit thereof; and a material, chemically bonded to said water-swellable polymer by means of a proton-donating group of said material, capable of reacting with said first reactive functional group, said proton-donating group selected from the group consisting of an amino group, an imino group, a hydroxy group, a carboxyl group, a mercapto group, or mixtures thereof; said medical tool exhibiting lubricity in a wetted state.
Claim 3
Dependent Claim
30 words
The medical tool according to claim 1, wherein said first moiety is derived from at least one hydrophilic monomer selected from the group consisting of dimethyl acrylamide and maleic anhydride.
Claim 4
Dependent Claim
35 words
The medical tool according to claim 1, wherein said second moiety is derived from at least one monomer selected from the group consisting of glycidyl methacrylate, methacrylic acid chloride, methacryloyloxy ethyl isocyanate, and glycidyl acrylate.
Claim 5
Dependent Claim
29 words
The medical tool according to claim 1, wherein said water-swellable polymer contains at least one copolymer selected from the group consisting of a block copolymer and a graft copolymer.
Claim 6
Dependent Claim
14 words
The medical tool according to claim 4, wherein said copolymer is a block copolymer.
Claim 7
Dependent Claim
17 words
The medical tool according to claim 5, wherein said block copolymer comprises glycidyl methacrylate and dimethyl acrylamide.
Claim 8
Dependent Claim
30 words
The medical tool according to claim 1, wherein said material is at least one member selected from the group consisting of a modified polyolefin, polyether, polyurethane, polyamide, polyimide and nylon.
Claim 9
Dependent Claim
18 words
The medical tool according to claim 7, wherein said modified polyolefin is a polyolefin modified with methacrylic acid.
Claim 10
Dependent Claim
15 words
The medical tool according to claim 1, wherein said proton-donating group is a carboxyl group.
Claim 11
Dependent Claim
11 words
A medical tool according to claim 1, which is a catheter.
Claim 12
Dependent Claim
77 words
A medical tool comprising: a water-swellable polymer comprising a moiety manifesting lubricity and another moiety having a reactive functional group selected from the group consisting of a hydroxy group, an amino group, and an epoxy group in the molecular unit thereof; and a material chemically bonded to said water-swellable polymer by means of an acid anhydride group of said material capable of reacting with said reactive functional group; said medical tool exhibiting lubricity in a wetted state.
Claim 13
Dependent Claim
77 words
A medical tool comprising: a water-swellable polymer comprising a moiety manifesting lubricity and another moiety having a reactive functional group selected from the group consisting of a hydroxy group, an amino group, and an epoxy group in the molecular unit thereof; and a material chemically bonded to said water-swellable polymer by means of an acid anhydride group of said material capable of reacting with said reactive functional group; said medical tool exhibiting lubricity in a wetted state.
Claim 14
Dependent Claim
34 words
The medical tool according to claim 11, wherein said moiety manifesting lubricity is derived from at least one hydrophilic monomer selected from the group consisting of dimethyl acrylamide, acrylamide, vinyl pyrrolidone, and vinyl ether.
Claim 15
Dependent Claim
16 words
The medical tool according to claim 11, wherein said another moiety is derived from glycidyl methacrylate.
Claim 16
Dependent Claim
29 words
The medical tool according to claim 11, wherein said water-swellable polymer contains at least one copolymer selected from the group consisting of a block copolymer and a graft copolymer.
Claim 17
Dependent Claim
14 words
The medical tool according to claim 14, wherein said copolymer is a block copolymer.
Claim 18
Dependent Claim
17 words
The medical tool according to claim 15, wherein said block copolymer comprises glycidyl methacrylate and dimethyl acrylamide.
Claim 19
Dependent Claim
14 words
The medical tool according to claim 11, wherein said acid anhydride is maleic anhydride.
Claim 20
Dependent Claim
11 words
The medical tool according to claim 11, which is a catheter.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
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| 3.5 Years (Year 4) | 1998-08-14 | 1999-02-13 | 1999-08-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2002-08-14 | 2003-02-13 | 2003-08-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2006-08-14 | 2007-02-13 | 2007-08-15 | $7700.00 | Window Closed / Lapsed |