US4112989A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Flexible collapsible blood freezing containers
Assignee: Baxter International Inc
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Filing: 1975-11-06
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Granted: 1978-09-12
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Expires: 1995-11-06
Abstract
Abstract Improved, flexible, collapsible containers are provided for the storage of frozen blood and the like at cryogenic temperatures. The containers are defined by plastic walls consisting essentially of a biaxially-oriented ethylene-vinyl acetate copolymer containing from ten to thirty-five percent by weight of vinyl acetate units. The container wall thickness is typically from 0.01 to 0.025 inch.
Inventors
- 👤 Gerald Arthur Grode
- 👤 Daniel Roy Boggs
- 👤 James Irvin Wright
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 06:00
CPC Classifications
A; A61; A61J; A61J1/00; A61J1/05; A61J1/10; B; B29; B29C; B29C65/00; B29C65/02; B29C65/04; B29C66/00; B29C66/70; B29C66/71; B29K; B29K2023/00; B29K2023/04; B29K2023/06; B29K2031/00; B29K2031/04; B29K2105/00; B29K2105/0085; B29K2995/00; B29K2995/0037; B29K2995/005; B29K2995/0053; B29L; B29L2031/00; B29L2031/712; B29L2031/7148; Y; Y10; Y10S; Y10S383/00; Y10S383/908; Y10T; Y10T428/00; Y10T428/13; Y10T428/1334; Y10T428/1345
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
63 words
An improved, flexible, collapsible container, having improved physical strength at cryogenic temperatures, defining walls which consist essentially of a biaxially-oriented ethylene-vinyl acetate copolymer containing from 10 to 35 percent by weight of vinyl acetate units, in which said walls have a thickness of from 0.01 to 0.025 inch, said walls being sealed together by a radio frequency generated seal to define said container.
Claim 2
Dependent Claim
63 words
An improved, flexible, collapsible container, having improved physical strength at cryogenic temperatures, defining walls which consist essentially of a biaxially-oriented ethylene-vinyl acetate copolymer containing from 10 to 35 percent by weight of vinyl acetate units, in which said walls have a thickness of from 0.01 to 0.025 inch, said walls being sealed together by a radio frequency generated seal to define said container.
Claim 3
Dependent Claim
42 words
The container of claim 1 which is made from ethylene-vinyl acetate copolymer film which has been biaxially oriented by being stretched in two generally perpendicular directions to achieve at least a two-fold increase in dimension of said film in each said direction.
Claim 4
Dependent Claim
21 words
The container of claim 2 in which said copolymer contains from 15 to 25 percent by weight of vinyl acetate units.
Claim 5
Dependent Claim
27 words
The container of claim 3 in which said copolymer contains about 18 percent by weight of vinyl acetate units, and said walls are about 0.015 inch thick.
Claim 6
Dependent Claim
19 words
The container of claim 3 which comprises a pair of sheets of said copolymer, sealed together at their edges.
References Cited (Backward Citations)
US3244680A
Cited
US3399250A
Cited
US3796696A
Cited
US3483023A
Cited
US3554256A
Cited
US3708110A
Cited
US3810503A
Cited
US3915212A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1981-09-11 | 1982-03-13 | 1982-09-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-09-11 | 1986-03-13 | 1986-09-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-09-11 | 1990-03-13 | 1990-09-12 | $7700.00 | Window Closed / Lapsed |