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US4212299A
Expired / Lapsed
US
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Container bag
Assignee: Toppan Inc
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Filing: 1978-06-02
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Granted: 1980-07-15
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Expires: 1998-06-02
Abstract
Abstract A container bag for use in preserving blood or its component materials in liquid nitrogen. The container bag has excellent physical properties especially in quite low temperature conditions and is composed of: an inner layer made of ethylene-tetrafluoroethylene copolymer and an outer layer made of one member selected from the group consisting of polyethylene phthalate, polyethylene naphthalate, cross-linked polyethylene, perfluoroalkoxy resin, polytetrafluoroethylene, tetrafluoroethylene-hexafluoropropylene copolymer and aromatic polyimide.
Inventors
- 👤 Shyoji Yokokoji
- 👤 Kazuhisa Hoshino
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 12:44
CPC Classifications
B; B32; B32B; B32B27/00; B32B27/06; B32B27/08; A; A61; A61J; A61J1/00; A61J1/05; A61J1/10; B32B27/32; B32B27/322; B32B27/36; B32B7/00; B32B7/04; B32B7/12; B32B2327/00; B32B2327/12; B32B2327/18; B32B2367/00; B32B2439/00; B32B2439/80; Y; Y10; Y10S; Y10S128/00; Y10S128/24
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
68 words
A container bag for preserving blood or its component materials at temperatures in the range of liquid nitrogen temperatures, which container bag comprises an inner layer of ethylene-tetrafluoroethylene copolymer, and an outer layer of a member selected from the group consisting of perfluoroalkoxy resin, polytetrafluoroethylene, and tetrafluoroethylene-hexafluoropropylene copolymer, said outer layer materials having melting points or thermal sticking points which are higher than those of said inner layer.
Claim 2
Dependent Claim
68 words
A container bag for preserving blood or its component materials at temperatures in the range of liquid nitrogen temperatures, which container bag comprises an inner layer of ethylene-tetrafluoroethylene copolymer, and an outer layer of a member selected from the group consisting of perfluoroalkoxy resin, polytetrafluoroethylene, and tetrafluoroethylene-hexafluoropropylene copolymer, said outer layer materials having melting points or thermal sticking points which are higher than those of said inner layer.
Claim 3
Dependent Claim
23 words
A container bag as claimed in claim 1, wherein said inner layer and said outer layer are bonded together by using an adhesive.
Claim 4
Dependent Claim
32 words
A container bag as claimed in claim 1, wherein a thermally resistant adhesive is used, which adhesive is selected from the group consisting of polyester type, polyurethane type and epoxy type adhesives.
Claim 5
Dependent Claim
25 words
A container bag as claimed in claim 1, wherein the total thickness of the film for forming said bag is not more than 0.1 mm.
Claim 6
Dependent Claim
19 words
A container bag as claimed in claim 1, which is provided with an inlet member and an outlet member.
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) | 1983-07-15 | 1984-01-14 | 1984-07-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1987-07-15 | 1988-01-14 | 1988-07-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1991-07-15 | 1992-01-14 | 1992-07-15 | $7700.00 | Window Closed / Lapsed |