US4664658A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Medical material and process for its production
Assignee: Mitsubishi Chemical Corp
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Filing: 1985-11-07
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Granted: 1987-05-12
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Expires: 2005-11-07
Abstract
Abstract A medical material comprising a shaped article made of a soft vinyl chloride resin composition, a layer formed on the shaped article and composed essentially of crosslinked gelatin having good bio-compatibility with a living body, and an intermediate bonding layer firmly bonding the crosslinked gelatin layer to the shaped article.
Inventors
- 👤 Tsutomu Sawada
- 👤 Kyoji Yoshida
- 👤 Shozo Takano
- 👤 Masanori Fujikawa
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 12:16
CPC Classifications
A; A61; A61L; A61L29/00; A61L29/08; A61L29/085; Y; Y10; Y10T; Y10T428/00; Y10T428/13; Y10T428/1352; Y10T428/1379
Claims Analysis
Total Claims: 25
Claim 1
Independent Claim
51 words
A medical article, comprising a shaped article made of a soft vinyl chloride resin composition, a layer formed on the shaped article and composed essentially of crosslinked gelatin having a good bio-compatibility with a living body, and an intermediate bonding layer firmly bonding the crosslinked gelatin layer to the shaped article.
Claim 2
Dependent Claim
51 words
A medical article, comprising a shaped article made of a soft vinyl chloride resin composition, a layer formed on the shaped article and composed essentially of crosslinked gelatin having a good bio-compatibility with a living body, and an intermediate bonding layer firmly bonding the crosslinked gelatin layer to the shaped article.
Claim 3
Dependent Claim
14 words
The medical article of claim 1, wherein the said shaped article is a tube.
Claim 4
Dependent Claim
14 words
The medical article of claim 1, wherein the said shaped article is a sheet.
Claim 5
Dependent Claim
64 words
A blood transportation tube comprising an outer tubular layer made of a soft vinyl chloride resin composition, an inner tubular layer formed on the inside of the said outer tubular layer and being composed essentially of crosslinked gelatin having a good bio-compatibility with a living body, and an intermediate bonding layer firmly bonding the said inner tubular layer to the said outer tubular layer.
Claim 6
Dependent Claim
64 words
A blood transportation tube comprising an outer tubular layer made of a soft vinyl chloride resin composition, an inner tubular layer formed on the inside of the said outer tubular layer and being composed essentially of crosslinked gelatin having a good bio-compatibility with a living body, and an intermediate bonding layer firmly bonding the said inner tubular layer to the said outer tubular layer.
Claim 7
Dependent Claim
53 words
The medical article of claim 1, wherein the said vinyl chloride resin composition is polyvinyl chloride or a copolymer of vinyl chloride with ethylene, propylene, vinyl acetate, acrylic acid, and alkyl ester of acrylic acid, methacrylic acid, and alkyl ester of methacrylic acid, maleic acid, fumaric acid, itaconic acid, acrylonitrile or vinylidene chloride.
Claim 8
Dependent Claim
55 words
The blood transporation tube of claim 4, wherein the said soft vinyl chloride resin composition is polyvinyl chloride or a copolymer of vinyl chloride with ehylene, propylene, vinyl acetate, acrylic acid, an alkyl ester of acrylic acid, methacrylic acid, and alkyl ester of methacrylic acid, maleic acid, fumaric acid, itaconic acid, acrylonitrile or vinylidene chloride.
Claim 9
Dependent Claim
31 words
The medical article of claim 1, wherein the said vinyl chloride resin contains from 30 to 60 parts by weight of plasticizer per 100 parts by weight of the substrate resin.
Claim 10
Dependent Claim
32 words
The blood transporation tube of claim 4, wherein the said vinyl chloride resin comprises 30 to 60 parts by weight of a plasticizer per 100 parts by weight of the substrate resin.
Claim 11
Dependent Claim
44 words
The medical article of claim 7, wherein the said plasticizer comprises a phthalic acid derivative including di-2-octyl phthalate, di-2-ethyhexyl phthalate or diisodecyl phthalate; and isophthalic acid derivative including diisooctyl isophthalate; and adipic acid derivative including dioctyl adipate; triceresyl phosphate; or an epoxy-modified soybean oil.
Claim 12
Dependent Claim
45 words
The blood transporation tube of claim 8, wherein the said plasticizer comprises a phthalic acid derivative including di-2-octyl phthalate, di-2-ethylhexyl phthalate or diisodecyl phthalate; an isophthalic acid derivative including diisooctyl isophthalate; and adipic acid derivative including dioctyl adipate; tricresyl phosphate; or an epoxy-modified soybean oil.
Claim 13
Dependent Claim
17 words
The medical article of claim 1, wherein the said resin comprises a thermal stabilizer or a lubricant.
Claim 14
Dependent Claim
18 words
The blood transporation tube of claim 4, wherein the said resin comprises a thermal stabilizer or a lubricant.
Claim 15
Dependent Claim
29 words
The medical article of claim 2, wherein the said tube has an outer diameter of no more than 10 mm and an inner diameter of at least 3 mm.
Claim 16
Dependent Claim
19 words
The medical article of claim 13, wherein the said sheet has a thickness of from 0.1 to 2 mm.
Claim 17
Dependent Claim
30 words
The blood transportation tube of claim 4, wherein the said tube has an outer diameter of not more than 10 mm and an inner diameter of at least 3 mm.
Claim 18
Dependent Claim
17 words
The medical article of claim 1, wherein the said intermediate bonding layer comprises a hydrophilic water-insoluble material.
Claim 19
Dependent Claim
18 words
The blood transportation tube of claim 4, wherein the said intermediate bonding layer comprises a hydrophilic water-insoluble material.
Claim 20
Dependent Claim
41 words
The medical article of claim 1, wherein the said intermediate bonding layer is a polymer of a compound having an hydrophilic group, or a random copolymer of block copolymer of a compound having a hydrophilic group with another compound copolymerizable therewith.
Claim 21
Dependent Claim
42 words
The blood transporation tube of claim 4, wherein the said intermediate bonding layer is a polymer of a compound having a hydrophilic group, or a random copolymer or block copolymer of a compound having a hydrophilic group with another compound copolymerizable therewith.
Claim 22
Dependent Claim
16 words
The medical article of claim 1, wherein the said intermediate bonding layer comprises an acrylic resin.
Claim 23
Dependent Claim
17 words
The blood transportation tube of claim 15, wherein the said intermediate bonding layer comprises an acrylic resin.
Claim 24
Dependent Claim
44 words
The medical article of claim 1, wherein the said gelatin is obtained by the hydrolysis of collagen to polypeptide chains, or by the further splitting of such isolated polypeptide chains, and wherein the said gelatin has a molecular weight of from 15,000 to 250,000.
Claim 25
Dependent Claim
45 words
The blood transportation tube of claim 4, wherein the said gelatin is obtained by the hydrolysis of collagen to polypeptide chains, or by the further splitting of such isolated polypeptide chains, and wherein the said gelatin has a molecular weight of from 15,000 to 250,000.
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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) | 1990-05-11 | 1990-11-10 | 1991-05-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1994-05-11 | 1994-11-10 | 1995-05-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1998-05-11 | 1998-11-10 | 1999-05-12 | $7700.00 | Window Closed / Lapsed |