US5389092A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Non-adhesive healing dressing
Assignee: Laboratoires dHygiene et de Dietetique SA
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Filing: 1992-06-24
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Granted: 1995-02-14
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Expires: 2012-06-24
Abstract
Abstract The present invention relates to a dressing comprising a mixture of block copolymer with a saturated central sequence and plasticizer. The saturated central sequence has three sequences wherein the structure at each block is a polystyrene terminal block and the central sequence is a saturated polyolefin block.
Inventors
- 👤 Alain Guillemet
- 👤 Philippe Janod
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 18:55
CPC Classifications
A; A61; A61L; A61L15/00; A61L15/16; A61L15/42; A61L15/44; A61L15/07; A61L15/10; A61L15/22; A61L15/225; A61L2300/00; A61L2300/20; A61L2300/252; A61L2300/254; A61L2300/30; A61L2300/40
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
47 words
A dressing with a matrix containing a block copolymer, said matrix consisting essentially of 10 to 30 parts by weight of a block copolymer with a saturated central sequence, which is a polystyrene/polyethylene-butylene/polystyrene copolymer, and 70 to 90 parts by weight of a plasticizer which is petrolatum.
Claim 2
Dependent Claim
47 words
A dressing with a matrix containing a block copolymer, said matrix consisting essentially of 10 to 30 parts by weight of a block copolymer with a saturated central sequence, which is a polystyrene/polyethylene-butylene/polystyrene copolymer, and 70 to 90 parts by weight of a plasticizer which is petrolatum.
Claim 3
Dependent Claim
51 words
A dressing according to claim 1 said matrix consisting essentially of 15 to 25 parts by weight of polystyrene/polyethylene-butylene/polystyrene in which the ratio of styrene units/ethylene-butylene units is less than 0.5 , and 75 to 85 parts by weight of petrolatum with a drop point of between 40° and 60° C.
Claim 4
Dependent Claim
66 words
A dressing with a matrix containing a block copolymer, said matrix consisting essentially of: (a) 10 to 30 parts by weight of a block copolymer with a saturated central sequence which is a polystyrene/polyethylene-butylene/polystyrene copolymer; (b) 70 to 90 parts by weight of a plasticizer which is petrolatum; (c) a therapeutically effective amount of an active principle; and (d) a web embedded in the said matrix.
Claim 5
Dependent Claim
66 words
A dressing with a matrix containing a block copolymer, said matrix consisting essentially of: (a) 10 to 30 parts by weight of a block copolymer with a saturated central sequence which is a polystyrene/polyethylene-butylene/polystyrene copolymer; (b) 70 to 90 parts by weight of a plasticizer which is petrolatum; (c) a therapeutically effective amount of an active principle; and (d) a web embedded in the said matrix.
Claim 6
Dependent Claim
34 words
A dressing according to claim 3, wherein the active principle is selected from a group consisting of antiinflammatories, analgesics, antibiotics, antifungal agents, antibacterial agents, antiseptics, anaesthetics, proteolytic enzymes, healing adjuvants, growth factors and propolis.
Claim 7
Dependent Claim
17 words
A dressing according to claim 1 which also comprises a support covering one face of the matrix.
Claim 8
Dependent Claim
50 words
A dressing according to claim 1, said matrix consisting essentially of 15 to 25 parts by weight of polystyrene/polyethylene-butylene/polystrene in which the ratio of styrene units/ethylene-butylene units is less than 0.4 and 75 to 85 parts by weight of petrolatum with a drop point of between 40° to 60° C.
Claim 9
Independent Claim
94 words
A method of using a dressing comprising providing a dressing with a matrix containing a block copolymer, said matrix consisting essentially of 10 to 30 parts by weight of the block copolymer with a saturated central sequence, and 70 to 90 parts by weight of plasticizer; said block copolymer having 3 sequences wherein the structure at the end of each block is a polystyrene terminal block in the central sequence between said terminal block is a saturated polyolefin block; said method further comprising applying said dressing to the wound or skin of a mammal.
Claim 10
Independent Claim
94 words
A method of using a dressing comprising providing a dressing with a matrix containing a block copolymer, said matrix consisting essentially of 10 to 30 parts by weight of the block copolymer with a saturated central sequence, and 70 to 90 parts by weight of plasticizer; said block copolymer having 3 sequences wherein the structure at the end of each block is a polystyrene terminal block in the central sequence between said terminal block is a saturated polyolefin block; said method further comprising applying said dressing to the wound or skin of a mammal.
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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) | 1998-02-13 | 1998-08-15 | 1999-02-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2002-02-13 | 2002-08-15 | 2003-02-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2006-02-13 | 2006-08-15 | 2007-02-14 | $7700.00 | Window Closed / Lapsed |