US4547191A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Medical solution transfusion circuit
Assignee: Terumo Corp
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Filing: 1984-08-13
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Granted: 1985-10-15
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Expires: 2004-08-13
Abstract
Abstract A medical solution transfusion circuit has a transparent cylindrical pumping body, a hard cap mounted on at least one end of said transparent cylindrical pumping body, and a flexible tube for communicating with said transparent cylindrical pumping body to transport a medical solution. The transparent cylindrical pumping body comprises a propylene/α-olefin copolymer.
Inventors
- 👤 Toshiji Ichikawa
- 👤 Yoshinori Ohhachi
- 👤 Zensho Kanda
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 00:25
CPC Classifications
A; A61; A61M; A61M5/00; A61M5/14
Claims Analysis
Total Claims: 15
Claim 1
Independent Claim
53 words
A medical solution transfusion circuit having a transparent cylindrical pumping body, a hard cap mounted on at least one end of said transparent cylindrical pumping body, and a flexible tube for communicating with said transparent cylindrical pumping body to transport a medical solution, wherein said transparent cylindrical pumping body comprises a propylene/α-olefin copolymer.
Claim 2
Dependent Claim
53 words
A medical solution transfusion circuit having a transparent cylindrical pumping body, a hard cap mounted on at least one end of said transparent cylindrical pumping body, and a flexible tube for communicating with said transparent cylindrical pumping body to transport a medical solution, wherein said transparent cylindrical pumping body comprises a propylene/α-olefin copolymer.
Claim 3
Dependent Claim
17 words
A circuit according to claim 1, wherein said hard cap comprises polypropylene or polypropylene containing a filler.
Claim 4
Dependent Claim
18 words
A circuit according to claim 2, wherein polypropylene has a weight average molecular weight of 80,000 to 900,000.
Claim 5
Dependent Claim
29 words
A circuit according to claim 2, wherein said filler is a material selected from the group consisting of a glass fiber, a carbon fiber, mica, talc and calcium carbonate.
Claim 6
Dependent Claim
27 words
A circuit according to claim 1, wherein a content of α-olefin in the propylene/α-olefin copolymer falls within a range between 50% by weight and 2% by weight.
Claim 7
Dependent Claim
11 words
A circuit according to claim 3, wherein the α-olefin comprises butene-1.
Claim 8
Dependent Claim
16 words
A circuit according to claim 1, wherein the α-olefin comprises a combination of ethylene and butene-1.
Claim 9
Dependent Claim
23 words
A circuit according to claim 1, wherein the α-olefin is a material selected from the group consisting of ethylene, butene-1, pentene-1 and 4-methylpentene-1.
Claim 10
Dependent Claim
27 words
A circuit according to claim 1, wherein said cylindrical body is made of a propylene/α-olefin copolymer and not more than 30% by weight of an ethylene/α-olefin copolymer.
Claim 11
Dependent Claim
24 words
A circuit according to claim 1, wherein the propylene/α-olefin copolymer has a weight average molecular weight falling within a range between 20,000 and 1,000,000.
Claim 12
Dependent Claim
20 words
A circuit according to claim 1, wherein the propylene/α-olefin copolymer contains 0.5 to 0.05% by weight of a nucleating agent.
Claim 13
Dependent Claim
22 words
A circuit according to claim 1, wherein the propylene/α-olefin copolymer has a modulus of elasticity of 10,000 to 1,000 kg/cm 2 .
Claim 14
Dependent Claim
14 words
A circuit according to claim 1, wherein said cylindrical body constitutes a drip chamber.
Claim 15
Dependent Claim
20 words
A circuit according to claim 1, wherein said flexible cylindrical body and said hard cap are directly adhered by fusion.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1988-10-14 | 1989-04-15 | 1989-10-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1992-10-14 | 1993-04-15 | 1993-10-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1996-10-14 | 1997-04-15 | 1997-10-15 | $7700.00 | Window Closed / Lapsed |