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US5264488A Expired / Lapsed US ⏱️ 0.0 years remaining

Medical device

Assignee: Terumo Corp
•
Filing: 1992-01-29
•
Granted: 1993-11-23
•
Expires: 2012-01-29
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Abstract

Abstract A medical device produced by molding a composition comprising (I) 10 to 50% by weight of a polyolefin resin (II) 1 to 89% by weight of a hydrogenated diene polymer obtained by hydrogenating not less than 90 mol % of a butadiene moiety of a linear or branched copolymer consisting of a polybutadiene block segment (C) having a 1,2-vinyl bond content of not more than 20 mol % and a block segment (D) of either polybutadiene or a vinyl aromatic compound-butadiene copolymer whose butadiene moiety has a 1,2-vinyl bond content in the range of from 25 to 95 mol % and having a block structure represented by C-(D-C) n or (C-D) m , wherein n stands for an integer of at least 1 and m for an integer of at least 2, and (III) 1 to 89% by weight of at least one member selected from the group consisting of (i) a block copolymer composed of a polymer block having a vinyl aromatic compound as a main component thereof and a polymer block having a conjugate diene compound as a main component thereof, (ii) a hydrogenated random copolymer of a vinyl aromatic compound and a conjugated diene compound, and (iii) a hydrogenated block copolymer composed of a polymer block having a vinyl aromatic compound as a main component thereof and a polymer block having a conjugate diene compound as a main component thereof, wherein the sum of (1)+(R)+(III) is 100% by weight.

Inventors

  • 👤 Motokazu Takeuchi
  • 👤 Yasuo Toyama
  • 👤 Takumi Miyachi
  • 👤 Shuzo Yamashita
  • 👤 Shinichi Kora

Bibliographic Details

Application Number —
Jurisdiction US
Data Source google_patents
Last Synchronized 2026-10-30 15:59
CPC Classifications
C; C08; C08L; C08L23/00; C08L23/02; C08L23/04; C08L23/06; C08L23/10; C08L53/00; C08L53/02; C08L53/025; A; A61; A61J; A61J1/00; A61J1/05; A61J1/10; C08L2205/00; C08L2205/03

Claims Analysis

Total Claims: 8
Claim 1
Independent Claim 235 words
A medical device produced by molding a composition comprising: (I) 10 to 50% by weight of a polyolefin resin; (II) 1 to 89% by weight of a hydrogenated diene polymer obtained by hydrogenating not less than 90 mol % of a butadiene moiety of a linear or branched copolymer consisting of a polybutadiene block segment (C) having a 1,2-vinyl bond content of not more than 20 mol % and a block segment (D) of polybutadiene whose butadiene moiety has a 1,2-vinyl bond content in the range of from 25 to 95 mol % and having a block structure represented by C-(D-C) n or (C-D) m , wherein n stands for an integer of at least 1 and m for an integer of at least 2; and (III) 1 to 89% by weight of at least one member selected from the group consisting of (i) a block copolymer comprised of a polymer block having a vinyl aromatic compound as a main component thereof and a polymer block having a conjugate diene compound as a main component thereof, (ii) a hydrogenated random copolymer of a vinyl aromatic compound and a conjugated diene compound, and (iii) a hydrogenated block copolymer composed of a polymer block having a vinyl aromatic compound as a main component thereof and a polymer block having a conjugate diene compound as a main component thereof, wherein the sum of (I)+(II)+(III) is 100% by weight.
Claim 2
Dependent Claim 235 words
A medical device produced by molding a composition comprising: (I) 10 to 50% by weight of a polyolefin resin; (II) 1 to 89% by weight of a hydrogenated diene polymer obtained by hydrogenating not less than 90 mol % of a butadiene moiety of a linear or branched copolymer consisting of a polybutadiene block segment (C) having a 1,2-vinyl bond content of not more than 20 mol % and a block segment (D) of polybutadiene whose butadiene moiety has a 1,2-vinyl bond content in the range of from 25 to 95 mol % and having a block structure represented by C-(D-C) n or (C-D) m , wherein n stands for an integer of at least 1 and m for an integer of at least 2; and (III) 1 to 89% by weight of at least one member selected from the group consisting of (i) a block copolymer comprised of a polymer block having a vinyl aromatic compound as a main component thereof and a polymer block having a conjugate diene compound as a main component thereof, (ii) a hydrogenated random copolymer of a vinyl aromatic compound and a conjugated diene compound, and (iii) a hydrogenated block copolymer composed of a polymer block having a vinyl aromatic compound as a main component thereof and a polymer block having a conjugate diene compound as a main component thereof, wherein the sum of (I)+(II)+(III) is 100% by weight.
Claim 3
Dependent Claim 50 words
A medical device according to claim 1, wherein said composition comprises (I) 15 to 50% by weight of said polyolefin type resin, (II) 3 to 75% by weight of said hydrogenated diene type polymer, and (III) 3 to 75% by weight of said block copolymer or a hydrogenation product thereof.
Claim 4
Dependent Claim 44 words
A medical device according to claim 1, wherein the proportions of said block C and said block D forming said hydrogenated diene type polymer are 5 to 90% by weight of said block C and 95 to 10% by weight of said block D.
Claim 5
Dependent Claim 19 words
A medical device according to claim 1, wherein said polyolefin resin is a polymer of ethylene, propylene and 4-methyl-1-pentene.
Claim 6
Dependent Claim 13 words
A medical device according to claim 4, wherein said polyolefin resin is polypropylene.
Claim 7
Dependent Claim 17 words
A medical device according to claim 1, wherein said vinyl aromatic compound is styrene or α-methyl styrene.
Claim 8
Dependent Claim 29 words
A medical device according to claim 1, wherein the weight average molecular weight of said block C and that of said block D are both not less than 5,000.

References Cited (Backward Citations)

GB2090840A Cited
US4491648A Cited
EP0330151A2 Cited
JPH02133406A Cited
JPH03128957A Cited

USPTO Annuity & Maintenance Windows

Annuity Stage Window Opens Payment Deadline Surcharge Period Until Estimated Fee Status
3.5 Years (Year 4) 1996-11-22 1997-05-24 1997-11-23 $2000.00 Window Closed / Lapsed
7.5 Years (Year 8) 2000-11-22 2001-05-24 2001-11-23 $3760.00 Window Closed / Lapsed
11.5 Years (Year 12) 2004-11-22 2005-05-24 2005-11-23 $7700.00 Window Closed / Lapsed

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