Patent US529492A successfully refreshed from Google Patents.
Patent US4643926A successfully refreshed from Google Patents.
US4643926A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Flexible medical solution pouches
Assignee: Cryovac LLC
•
Filing: 1985-04-29
•
Granted: 1987-02-17
•
Expires: 2005-04-29
Abstract
Abstract A flexible film suitable for medical solution pouches and parenteral materials generally includes a sealant layer of ethylene propylene copolymer, modified ethylene propylene copolymer, or flexible copolyester; one or more interior layers including elastomeric polymeric materials, and an outer layer of ethylene propylene copolymer or a flexible copolyester.
Inventors
- 👤 Walter B. Mueller
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 19:23
CPC Classifications
B; B32; B32B; B32B27/00; B32B27/06; B32B27/08; B32B27/32; B32B27/30; B32B27/306; B32B27/308; B32B7/00; B32B7/04; B32B7/12; A; A61; A61J; A61J1/00; A61J1/05; A61J1/10; B32B2270/00; B32B2439/00; Y; Y10; Y10T; Y10T428/00; Y10T428/13; Y10T428/1334; Y10T428/28; Y10T428/2813; Y10T428/2817; Y10T428/2826; Y10T428/31504; Y10T428/31786; Y10T428/31797; Y10T428/31855; Y10T428/31909; Y10T428/31913; Y10T428/31917
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
137 words
A flexible film comprising: (a) a sealant layer comprising ethylene propylene copolymer; modified ethylene propylene copolymer or flexible copolyester; (b) a second interior layer comprising (i) a blend of ethylene propylene copolymer with a polymeric material selected from the group consisting of modified ethylene propylene copolymer, a blend of ethylene propylene monomer and ethylene vinyl acetate copolymer, ethylene propylene diene monomer, and very low density polyethylene, or (ii) modified ethylene vinyl acetate copolymer; or (iii) a blend of modified ethylene propylene copolymer and very low density polyethylene; (c) a third interior layer comprising a polymeric material which imparts flexibility to the film; (d) a fourth interior layer comprising (i) a polymeric material or blend of materials substantially similar to the second layer, or (ii) ethylene methacrylate copolymer; and (e) a fifth outer layer comprising a flexible copolyester.
Claim 2
Dependent Claim
137 words
A flexible film comprising: (a) a sealant layer comprising ethylene propylene copolymer; modified ethylene propylene copolymer or flexible copolyester; (b) a second interior layer comprising (i) a blend of ethylene propylene copolymer with a polymeric material selected from the group consisting of modified ethylene propylene copolymer, a blend of ethylene propylene monomer and ethylene vinyl acetate copolymer, ethylene propylene diene monomer, and very low density polyethylene, or (ii) modified ethylene vinyl acetate copolymer; or (iii) a blend of modified ethylene propylene copolymer and very low density polyethylene; (c) a third interior layer comprising a polymeric material which imparts flexibility to the film; (d) a fourth interior layer comprising (i) a polymeric material or blend of materials substantially similar to the second layer, or (ii) ethylene methacrylate copolymer; and (e) a fifth outer layer comprising a flexible copolyester.
Claim 3
Dependent Claim
149 words
A multi-layer flexible film comprising: (a) a sealant layer comprising ethylene propylene copolymer; (b) a second interior layer comprising a blend of ethylene propylene copolymer with a polymeric material which imparts flexibility to the film; (c) a third interior layer comprising a polymeric material selected from the group consisting of a blend of ethylene propylene monomer and ethylene vinyl acetate copolymer, a blend of ethylene propylene monomer and polypropylene, and ethylene propylene diene monomer; (d) a fourth interior layer comprising (i) a blend substantially similar to the second interior layer; (ii) ethylene methacrylate copolymer; (e) a fifth interior layer comprising (i) a blend of ethylene propylene monomer and ethylene vinyl acetate copolymer, or (ii) ethylene propylene diene monomer; (f) a sixth interior layer comprising (i) a blend substantially similar to the fourth interior layer, or (ii) an elastomeric adhesive material; and (g) a seventh outer layer comprising flexible copolyester.
Claim 4
Dependent Claim
149 words
A multi-layer flexible film comprising: (a) a sealant layer comprising ethylene propylene copolymer; (b) a second interior layer comprising a blend of ethylene propylene copolymer with a polymeric material which imparts flexibility to the film; (c) a third interior layer comprising a polymeric material selected from the group consisting of a blend of ethylene propylene monomer and ethylene vinyl acetate copolymer, a blend of ethylene propylene monomer and polypropylene, and ethylene propylene diene monomer; (d) a fourth interior layer comprising (i) a blend substantially similar to the second interior layer; (ii) ethylene methacrylate copolymer; (e) a fifth interior layer comprising (i) a blend of ethylene propylene monomer and ethylene vinyl acetate copolymer, or (ii) ethylene propylene diene monomer; (f) a sixth interior layer comprising (i) a blend substantially similar to the fourth interior layer, or (ii) an elastomeric adhesive material; and (g) a seventh outer layer comprising flexible copolyester.
Claim 5
Dependent Claim
36 words
A flexible laminate according to claim 2 wherein the polymeric material of the second interior layer comprises a blend of (a) ethylene propylene monomer and ethylene vinyl acetate copolymer, or (b) ethylene propylene monomer and polypropylene.
Claim 6
Dependent Claim
24 words
A flexible laminate according to claim 2 wherein the elastomeric adhesive material of the sixth interior layer comprises a modified ethylene vinyl acetate adhesive.
Claim 7
Dependent Claim
10 words
A flexible pouch made from a film of claim 2.
References Cited (Backward Citations)
US4188443A
Cited
US4274900A
Cited
US4359495A
Cited
US4352849A
Cited
US4391862A
Cited
EP0087080A1
Cited
US4407874A
Cited
GB2138431A
Cited
GB2139634A
Cited
US4528220A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1990-02-16 | 1990-08-18 | 1991-02-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1994-02-16 | 1994-08-18 | 1995-02-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1998-02-16 | 1998-08-18 | 1999-02-17 | $7700.00 | Window Closed / Lapsed |