US5356709A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Non-PVC coextruded medical grade port tubing
Assignee: Baxter International Inc
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Filing: 1992-05-14
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Granted: 1994-10-18
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Expires: 2012-05-14
Abstract
Abstract The present invention provides an improved coextruded medical grade port tubing. The medical grade port tubing provides characteristics that are desirable in the medical industry and therefore can be used as a medical port tubing in, for example, renal therapy or blood donor tubes. To this end, the present invention provides a non-PVC coextruded medical grade port tubing including: an outer layer comprising a blend of polypropylene copolymer and styrene-ethylene-butylene-styrene copolymer; a tie layer; and a core layer including a blend of polyamide and ethylene vinyl acetate.
Inventors
- 👤 Lecon Woo
- 👤 Y. Wilson Cheung
- 👤 Jerry D. Bartos
- 👤 Michael T. K. Ling
- 👤 Indrajit T. Patel
- 👤 Ying-Cheng Lo
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 09:31
CPC Classifications
B; B32; B32B; B32B27/00; B32B27/06; B32B27/08; A; A61; A61L; A61L29/00; A61L29/04; A61L29/049; A61L29/08; A61L29/085; A61L31/00; A61L31/04; A61L31/041; A61L31/08; A61L31/10; B32B1/00; B32B1/08; B32B7/00; B32B7/04; B32B7/12; B32B2270/00; B32B2535/00; Y; Y10; Y10T; Y10T428/00; Y10T428/29; Y10T428/2913; Y10T428/2933; Y10T428/2935; Y10T428/294; Y10T428/2942; Y10T428/2947; Y10T428/2973; Y10T428/2975; Y10T428/2982; Y10T428/2991; Y10T428/2998
Claims Analysis
Total Claims: 23
Claim 1
Independent Claim
70 words
A non-PVC coextruded medical grade port tubing comprising a multi-layer tubing having: (a) an outer layer including a blend of (i) polypropylene copolymer and (ii) styrene-ethylene-butylene-styrene copolymer; (b) a tie layer disposed adjacent and bonded to the outer layer (a); and (c) a core layer disposed adjacent and bonded to said tie layer (b) opposite said outer layer (a) including a blend of (i) polyamide and (ii) ethylene vinyl acetate.
Claim 2
Dependent Claim
70 words
A non-PVC coextruded medical grade port tubing comprising a multi-layer tubing having: (a) an outer layer including a blend of (i) polypropylene copolymer and (ii) styrene-ethylene-butylene-styrene copolymer; (b) a tie layer disposed adjacent and bonded to the outer layer (a); and (c) a core layer disposed adjacent and bonded to said tie layer (b) opposite said outer layer (a) including a blend of (i) polyamide and (ii) ethylene vinyl acetate.
Claim 3
Dependent Claim
31 words
The non-PVC medical grade port tubing of claim 1 wherein the tie layer (b) includes a blend of (i) polyester, (ii) polypropylene copolymer, (iii) styrene-ethylene-butylene-styrene copolymer, and (iv) ethylene vinyl acetate.
Claim 4
Dependent Claim
60 words
The non-PVC coextruded medical grade port tubing of claim 1 wherein the tie layer (b) is a blend comprising: (i) approximately 30 to about 60% by weight copolyester; (ii) approximately 0 to about 20% by weight polypropylene copolymer; (iii) approximately 30 to about 60% by weight styrene-ethylene-butylene-styrene copolymer; and (iv) approximately 0 to about 30% by weight ethylene vinyl acetate.
Claim 5
Dependent Claim
39 words
The non-PVC coextruded medical port tubing of claim 1 wherein the outer layer (a) comprises a blend of: (i) approximately 40 to about 99% by weight polypropylene copolymer; and (ii) approximately 1 to about 60% by weight styrene-ethylene-butylene-styrene copolymer.
Claim 6
Dependent Claim
32 words
The non-PVC coextruded medical port tubing of claim 1 wherein the outer layer (a) comprises a blend of (i) approximately 60% by weight polypropylene copolymer and (ii) approximately 40% by weight styrene-ethylene-butylene-styrene.
Claim 7
Dependent Claim
28 words
The non-PVC coextruded medical grade port tubing of claim 1 wherein in the core layer (c) the polyamide component (i) includes at least two separate grades of polyamide.
Claim 8
Dependent Claim
25 words
The non-PVC coextruded medical grade port tubing of claim 6 wherein the polyamide component (c)(i) includes polyamide Grade No. 1 and polyamide Grade No. 2.
Claim 9
Dependent Claim
32 words
The non-PVC coextruded medical grade port tubing of claim 1 wherein the core layer (c) comprises: (i) approximately 70% by weight block polyamide; and (ii) approximately 30% by weight ethylene vinyl acetate.
Claim 10
Dependent Claim
49 words
The non-PVC coextruded medical grade port tubing of claim 1 wherein the core layer (c) comprises: (i) a polyamide component including approximately 60% by weight block polyamide (Grade No. 1) and approximately 20% by weight block polyamide (Grade No. 2); and (ii) approximately 20% by weight ethylene vinyl acetate.
Claim 11
Dependent Claim
112 words
A non-PVC coextruded medical grade port tubing comprising a multi-layer tubing having: (a) an outer layer including a blend of (i) polypropylene copolymer and (ii) styrene-ethylene-butylene-styrene copolymer; (b) a tie layer disposed adjacent the outer bonded thereto including (i) approximately 30 to about 60% by weight copolyester, (ii) approximately 0 to about 20% by weight polypropylene copolymer, (iii) approximately 30 to about 60% by weight styrene-ethylene-butylene-styrene copolymer, and (iv) approximately 0 to about 30% by weight ethylene vinyl acetate; and (c) a core layer disposed adjacent the tie layer and bonded thereto opposite the outer layer including a blend of (i) at least one grade of polyamide and (ii) ethylene vinyl acetate.
Claim 12
Dependent Claim
112 words
A non-PVC coextruded medical grade port tubing comprising a multi-layer tubing having: (a) an outer layer including a blend of (i) polypropylene copolymer and (ii) styrene-ethylene-butylene-styrene copolymer; (b) a tie layer disposed adjacent the outer bonded thereto including (i) approximately 30 to about 60% by weight copolyester, (ii) approximately 0 to about 20% by weight polypropylene copolymer, (iii) approximately 30 to about 60% by weight styrene-ethylene-butylene-styrene copolymer, and (iv) approximately 0 to about 30% by weight ethylene vinyl acetate; and (c) a core layer disposed adjacent the tie layer and bonded thereto opposite the outer layer including a blend of (i) at least one grade of polyamide and (ii) ethylene vinyl acetate.
Claim 13
Dependent Claim
37 words
The non-PVC coextruded medical grade port tubing of claim 10 wherein the outer layer (c) comprises: (i) approximately 40 to about 99% by weight polypropylene copolymer; and (ii) approximately 1 to about 60% by weight styrene-ethylene-butylene-styrene copolymer.
Claim 14
Dependent Claim
30 words
The non-PVC coextruded medical grade port tubing of claim 10 wherein the outer layer (a) comprises (i) approximately 60% by weight polypropylene copolymer and (ii) approximately 40% by weight styrene-ethylene-butylene-styrene.
Claim 15
Dependent Claim
25 words
The non-PVC coextruded medical grade port tubing of claim 10 wherein the polyamide component (c)(i) includes polyamide Grade No. 1 and polyamide Grade No. 2.
Claim 16
Dependent Claim
32 words
The non-PVC coextruded medical grade port tubing of claim 10 wherein the core layer (c) comprises: (i) approximately 70% by weight block polyamide; and (ii) approximately 30% by weight ethylene vinyl acetate.
Claim 17
Dependent Claim
49 words
The non-PVC coextruded medical grade port tubing of claim 10 wherein the core layer (c) comprises: (i) a polyamide component including approximately 60% by weight block polyamide (Grade No. 1) and approximately 20% by weight block polyamide (Grade No. 2); and (ii) approximately 20% by weight ethylene vinyl acetate.
Claim 18
Dependent Claim
81 words
A non-PVC medical container for housing medical fluid including a non-PVC coextruded medical grade port tubing that comprises a multi-layer tubing having: (a) an outer layer including a blend of (i) polypropylene copolymer and (ii) styrene-ethylene-butylene-styrene copolymer; (b) a tie layer disposed adjacent and bonded to the outer layer (a); and a core layer disposed adjacent and bonded to the tie layer (b) opposite outer layer (a) including a blend of (i) at least one polyamide and (ii) ethylene vinyl acetate.
Claim 19
Dependent Claim
81 words
A non-PVC medical container for housing medical fluid including a non-PVC coextruded medical grade port tubing that comprises a multi-layer tubing having: (a) an outer layer including a blend of (i) polypropylene copolymer and (ii) styrene-ethylene-butylene-styrene copolymer; (b) a tie layer disposed adjacent and bonded to the outer layer (a); and a core layer disposed adjacent and bonded to the tie layer (b) opposite outer layer (a) including a blend of (i) at least one polyamide and (ii) ethylene vinyl acetate.
Claim 20
Dependent Claim
35 words
The non-PVC medical container of claim 16 wherein the tie layer (b) of the medical grade port tubing comprises a blend of (i) polyester, (ii) polypropylene copolymer, (iii) styrene-ethylene-butylene-styrene copolymer, and (iv) ethylene vinyl acetate.
Claim 21
Dependent Claim
63 words
The non-PVC medical container of claim 16 wherein the tie layer (b) of the medical grade port tubing is a blend comprising: (i) approximately 30 to about 60% by weight copolyester; (ii) approximately 0 to about 20% by weight polypropylene copolymer; (iii) approximately 30 to about 60% by weight styrene-ethylene-butylene-styrene copolymer; and (iv) approximately 0 to about 30% by weight ethylene vinyl acetate.
Claim 22
Dependent Claim
40 words
The non-PVC medical container of claim 16 wherein the outer layer (a) of the medical grade port tubing comprises: (i) approximately 40 to about 99% by weight polypropylene copolymer; and (ii) approximately 1 to about 60% by weight styrene-ethylene-butylene-styrene copolymer.
Claim 23
Dependent Claim
31 words
The non-PVC medical container of claim 16 wherein the polyamide component (i) of the core layer (c) of the medical grade port tubing includes at least two separate grades of polyamide.
References Cited (Backward Citations)
US3995084A
Cited
US4087587A
Cited
US4087588A
Cited
US4233367A
Cited
US4140162A
Cited
US4327726A
Cited
US4407888A
Cited
US4322465A
Cited
US4417753A
Cited
US4562118A
Cited
US4521437A
Cited
US4915893A
Cited
US4479989A
Cited
US4834755A
Cited
US4724028A
Cited
US4707389A
Cited
US4657972A
Cited
US4923470A
Cited
US4643926A
Cited
US4772497A
Cited
US4627844A
Cited
US4996054A
Cited
US4764404A
Cited
US4778697A
Cited
US4803102A
Cited
US4753222A
Cited
US4767651A
Cited
US4735855A
Cited
US4734327A
Cited
US5085649A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1997-10-17 | 1998-04-18 | 1998-10-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2001-10-17 | 2002-04-18 | 2002-10-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2005-10-17 | 2006-04-18 | 2006-10-18 | $7700.00 | Window Closed / Lapsed |