Patent US4465487A successfully refreshed from Google Patents.
US4465487A
Expired / Lapsed
US
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Container for medical use
Assignee: Terumo Corp
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Filing: 1982-06-03
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Granted: 1984-08-14
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Expires: 2002-06-03
Abstract
Abstract A collapsible container for medical use which has an improved low temperature characteristics and can withstand high temperatures of high-pressure steam sterilization, includes a container main body made by irradiating a hollow molding having a desired shape formed of an ethylene-vinyl acetate copolymer with an electron beam to cross-link the copolymer, thus providing a main body. The main body is completely sealed at its periphery except for a predetermined portion providing a non-sealed portion. The end of a functional accessory for achieving the function of the container for medical use is inserted in the non-sealed part of the main body. The accessory is sealed, at the inserted end, to the main body through an interlayer of a non-cross-linked ethylene-vinyl acetate copolymer.
Inventors
- 👤 Hideki Nakamura
- 👤 Toshinobu Ishida
- 👤 Takao Yoshida
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 22:03
CPC Classifications
A; A61; A61J; A61J1/00; A61J1/05; A61J1/10; B; B29; B29C; B29C65/00; B29C65/02; B29C65/04; B29C65/48; B29C65/4805; B29C65/483; B29C65/4845; B29C66/00; B29C66/01; B29C66/05; B29C66/10; B29C66/11; B29C66/112; B29C66/1122; B29C66/20; B29C66/24; B29C66/242; B29C66/2422; B29C66/24221; B29C66/50; B29C66/51; B29C66/53; B29C66/532; B29C66/5326; B29C66/53261; B29C66/53262; B29C66/70; B29C66/71; B29C66/73; B29C66/731; B29C66/7318; B29C66/73181; B29C66/73182; B29C66/737; B29C66/7375; B29C66/73753; B29C66/73754; B29C66/739; B29C66/7392; B29C66/73921; B29C35/00; B29C35/02; B29C35/08; B29C35/0866; B29C2035/0877; B29C65/50; B29C65/5057; B29C66/7394; B29C66/73941; B29C71/00; B29C71/04; B29K; B29K2031/00; B29K2031/04; B29K2033/00; B29K2033/04; B29K2105/00; B29K2105/0085; B29K2105/24; B29K2105/246; B29L; B29L2031/00; B29L2031/712; B29L2031/7148; Y; Y10; Y10T; Y10T428/00; Y10T428/13; Y10T428/1334; Y10T428/1352
Claims Analysis
Total Claims: 19
Claim 1
Independent Claim
181 words
A flexible and collapsible container for medical use which has an improved low temperature characteristic and can withstand high temperatures of high-pressure steam sterilization, comprising: a container main body made by irradiating a hollow molding having a desired container shape, formed of an ethylene-vinyl acetate copolymer containing 10 to 35% by weight of vinyl acetate, with an electron beam to cross-link the copolymer whereby said cross-linked copolymer has a gel content of 50 to 85% by weight, said container main body being completely sealed at its periphery except for a predetermined portion providing a non-sealed portion; a functional accessory for achieving the function of the container, having an end portion inserted in the non-sealed portion of the container main body, said functional accessory being made of a polymeric material, and having sufficient heat resistance to withstand high-pressure steam sterilization; and an interlayer for sealing said container main body at the non-sealed portion thereof to the inserted end portion of said functional accessory, said interlayer being made of a non-cross-linked ethylene-vinyl acetate copolymer containing 15 to 40% by weight of vinyl acetate.
Claim 2
Dependent Claim
181 words
A flexible and collapsible container for medical use which has an improved low temperature characteristic and can withstand high temperatures of high-pressure steam sterilization, comprising: a container main body made by irradiating a hollow molding having a desired container shape, formed of an ethylene-vinyl acetate copolymer containing 10 to 35% by weight of vinyl acetate, with an electron beam to cross-link the copolymer whereby said cross-linked copolymer has a gel content of 50 to 85% by weight, said container main body being completely sealed at its periphery except for a predetermined portion providing a non-sealed portion; a functional accessory for achieving the function of the container, having an end portion inserted in the non-sealed portion of the container main body, said functional accessory being made of a polymeric material, and having sufficient heat resistance to withstand high-pressure steam sterilization; and an interlayer for sealing said container main body at the non-sealed portion thereof to the inserted end portion of said functional accessory, said interlayer being made of a non-cross-linked ethylene-vinyl acetate copolymer containing 15 to 40% by weight of vinyl acetate.
Claim 3
Dependent Claim
29 words
The container according to claim 1 wherein the molding is formed by sealing a pair of sheets formed of the copolymer or a flat tube formed of the copolymer.
Claim 4
Dependent Claim
15 words
The container according to claim 1 wherein the molding is made by blow-molding the copolymer.
Claim 5
Dependent Claim
19 words
The container according to claim 1, wherein the container main body has a thickness of 0.1 to 0.6 mm.
Claim 6
Dependent Claim
23 words
The container according to claims 1, 2, 3, or 4 wherein the polymeric material adheres to the ethylene-vinyl acetate copolymer at high temperatures.
Claim 7
Dependent Claim
48 words
The container according to claim 5, wherein the polymeric material is a member selected from the group consisting of a high-density polyethylene, a first mixture of a high-density polyethylene and and ethylene-vinyl acetate copolymer, a polypropylene and a second mixture of a polypropylene and an ethylene-vinyl acetate copolymer.
Claim 8
Dependent Claim
22 words
The container according to claim 6, wherein the first mixture contains not more than 80% by weight of the ethylene-vinyl acetate copolymer.
Claim 9
Dependent Claim
24 words
The container according to claim 7, wherein the ethylene-vinyl acetate copolymer in the first mixture contains 15 to 40% by weight of vinyl acetate.
Claim 10
Dependent Claim
22 words
The container according to claim 6, wherein the second mixture contains not more than 85% by weight of the ethylene-vinyl acetate copolymer.
Claim 11
Dependent Claim
24 words
The container according to claim 9, wherein the ethylene-vinyl acetate copolymer in the second mixture contains 15 to 40% by weight of vinyl acetate.
Claim 12
Dependent Claim
19 words
The container according to claim 4, wherein the container main body has a thickness of 0.3 to 0.5 mm.
Claim 13
Dependent Claim
24 words
The container according to claim 1, wherein the amount of vinyl acetate in said non-cross-linked ethylene-vinyl acetate copolymer is 20 to 30% by weight.
Claim 14
Dependent Claim
297 words
A flexible and collapsible container for medical use which has an improved low temperature characteristic and can withstand high temperatures of high-pressure steam sterilization, comprising: a container main body having a thickness of 0.1 to 0.6 mm made by irradiating a hollow molding having a desired container shape, formed of an ethylene-vinyl acetate copolymer containing 10 to 35% by weight of vinyl acetate, with an electron beam to cross-link the copolymer whereby said cross-linked copolymer has a gel content of 50 to 80% by weight, said main body being completely sealed at its periphery except for a predetermined portion providing a non sealed portion; a functional accessory for achieving the function of the container, having an end portion inserted in the non-sealed portion of the main body, said functional accessory being made of a polymeric material selected from the group consisting of high density polyethylene; a first mixture containing a high density polyethylene and an ethylene-vinyl acetate copolymer wherein the amount of the ethylene-vinyl acetate copolymer is not more than 80% by weight; a polypropylene; and a second mixture containing a polypropylene and an ethylene-vinyl acetate copolymer wherein the amount of the ethylene-vinyl acetate copolymer is not more than 85% by weight, and wherein the amount of vinyl acetate in the copolymer of each of the first and second mixture is from 15 to 40% by weight, said polymeric material having sufficient heat resistance to withstand high-pressure steam sterilization and which adheres to the ethylene-vinyl acetate copolymer of the container main body at high temperatures; and an interlayer for sealing said container main body at the non-sealed portion thereof to the inserted end portion of said functional accessory, said interlayer being made of a non-cross-linked ethylene-vinyl acetate copolymer containing 15 to 40% by weight of vinyl acetate.
Claim 15
Dependent Claim
297 words
A flexible and collapsible container for medical use which has an improved low temperature characteristic and can withstand high temperatures of high-pressure steam sterilization, comprising: a container main body having a thickness of 0.1 to 0.6 mm made by irradiating a hollow molding having a desired container shape, formed of an ethylene-vinyl acetate copolymer containing 10 to 35% by weight of vinyl acetate, with an electron beam to cross-link the copolymer whereby said cross-linked copolymer has a gel content of 50 to 80% by weight, said main body being completely sealed at its periphery except for a predetermined portion providing a non sealed portion; a functional accessory for achieving the function of the container, having an end portion inserted in the non-sealed portion of the main body, said functional accessory being made of a polymeric material selected from the group consisting of high density polyethylene; a first mixture containing a high density polyethylene and an ethylene-vinyl acetate copolymer wherein the amount of the ethylene-vinyl acetate copolymer is not more than 80% by weight; a polypropylene; and a second mixture containing a polypropylene and an ethylene-vinyl acetate copolymer wherein the amount of the ethylene-vinyl acetate copolymer is not more than 85% by weight, and wherein the amount of vinyl acetate in the copolymer of each of the first and second mixture is from 15 to 40% by weight, said polymeric material having sufficient heat resistance to withstand high-pressure steam sterilization and which adheres to the ethylene-vinyl acetate copolymer of the container main body at high temperatures; and an interlayer for sealing said container main body at the non-sealed portion thereof to the inserted end portion of said functional accessory, said interlayer being made of a non-cross-linked ethylene-vinyl acetate copolymer containing 15 to 40% by weight of vinyl acetate.
Claim 16
Dependent Claim
19 words
The container according to claim 13, wherein the container main body has a thickness of 0.3 to 0.5 mm.
Claim 17
Dependent Claim
24 words
the container according to claim 13, wherein the amount of vinyl acetate in said non-cross-linked ethylene-vinyl acetate copolymer is 20 to 30% by weight.
Claim 18
Dependent Claim
29 words
The container according to claim 13, wherein the molding is formed by sealing a pair of sheets formed of the copolymer or a flat tube formed of the copolymer.
Claim 19
Dependent Claim
15 words
The container according to claim 13, wherein the molding is made by blow-molding the copolymer.
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) | 1987-08-14 | 1988-02-13 | 1988-08-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-08-14 | 1992-02-13 | 1992-08-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-08-14 | 1996-02-13 | 1996-08-14 | $7700.00 | Window Closed / Lapsed |