US4929479A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Medical bag
Assignee: Fuso Pharmaceutical Industries Ltd
•
Filing: 1988-05-24
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Granted: 1990-05-29
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Expires: 2008-05-24
Abstract
Abstract A medical bag composed of a laminate comprising (i) an inner low-density polyethylene layer, (ii) an intermediate layer of ethylene-vinyl acetate copolymer, ethylene-propylene type elastomer, or ethylene-butene-1 type elasomer, and (iii) an outer low-density polyethylene layer. This bag has excellent sanitariness, flexibility, transparency, and heat-resistance, therefore, is suitable for use as a container of blood and various medicinal liquids.
Inventors
- 👤 Kihachi Shishido
- 👤 Masami Matsuoka
- 👤 Noriyuki Ishihara
- 👤 Masahiro Tamura
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 19:32
CPC Classifications
B; B32; B32B; B32B27/00; B32B27/32; B32B27/06; B32B27/08; B32B27/30; B32B27/306; A; A61; A61J; A61J1/00; A61J1/05; A61J1/10; B32B2250/00; B32B2250/40; B32B2307/00; B32B2307/30; B32B2307/306; B32B2307/40; B32B2307/412; B32B2323/00; B32B2323/04; B32B2323/046; B32B2439/00; B32B2439/80; Y; Y10; Y10T; Y10T428/00; Y10T428/13; Y10T428/1334; Y10T428/24; Y10T428/24942; Y10T428/2495; Y10T428/24967; Y10T428/31504; Y10T428/31855; Y10T428/31909; Y10T428/31913; Y10T428/3192; Y10T428/31928
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
96 words
A medical bag composed of a laminate having a total thickness of 0.15 to 0.6 mm comprising: (i) an inner low-density polyethylene layer, (ii) an intermediate layer having a thickness of 60% to 90% of the total thickness and composed of (a) a non-hydrolyzed ethylene-vinyl acetate copolymer having a vinyl acetate content of 15% to 28% by weight; (b) an ethylene-propylene type elastomer having a propylene content of 15 to 40 mole %, or (c) an ethylene-butene-1 type elastomer having a butene-1 content of 8 to 20 mole %, and (iii) an outer low-density polyethylene layer.
Claim 2
Dependent Claim
96 words
A medical bag composed of a laminate having a total thickness of 0.15 to 0.6 mm comprising: (i) an inner low-density polyethylene layer, (ii) an intermediate layer having a thickness of 60% to 90% of the total thickness and composed of (a) a non-hydrolyzed ethylene-vinyl acetate copolymer having a vinyl acetate content of 15% to 28% by weight; (b) an ethylene-propylene type elastomer having a propylene content of 15 to 40 mole %, or (c) an ethylene-butene-1 type elastomer having a butene-1 content of 8 to 20 mole %, and (iii) an outer low-density polyethylene layer.
Claim 3
Dependent Claim
29 words
A medical bag as claimed in claim 1, wherein the inner and outer layers are composed of low-density polyethylene having a density of 0.920 to 0.390 g/cm 3 .
Claim 4
Dependent Claim
22 words
A medical bag as claimed in claim 1, wherein the ethylene-propylene type elastomer has a density of about 0.900 g/cm 3 .
Claim 5
Dependent Claim
22 words
A medical bag as claimed in claim 1, wherein the ethylene-butene-1 type elastomer has a density of about 0.890 g/cm 3 .
Claim 6
Dependent Claim
34 words
The medical bag as claimed in claim 1, wherein said laminate has a modulus of 600 kg/cm 2 or less as measured by a tapered stiffness meter according to the ASTM D 747 method.
Claim 7
Dependent Claim
34 words
The method bag as claimed in claim 5, wherein said laminate has a modulus of 500 kg/cm 2 or less as measured by a tapered stiffness meter according to the ASTM D 747 method.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1993-05-28 | 1993-11-27 | 1994-05-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1997-05-28 | 1997-11-27 | 1998-05-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2001-05-28 | 2001-11-27 | 2002-05-29 | $7700.00 | Window Closed / Lapsed |