US4801458A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Sustained release pharmaceutical plaster
Assignee: Teijin Ltd
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Filing: 1986-06-23
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Granted: 1989-01-31
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Expires: 2006-06-23
Abstract
Abstract PCT No. PCT/JP86/00317 Sec. 371 Date Feb. 24, 1987 Sec. 102(e) Date Feb. 24, 1987 PCT Filed Jun. 23, 1986 PCT Pub. No. WO87/00046 PCT Pub. Date Jan. 15, 1987.A sustained release pharmaceutical plaster which is characterized in that it is a pharmaceutical preparation mainly composed of an adhesive compound layer and a supporter which supports the adhesive compound layer, inside of which there is an arrangement of hollow fibers, that have radially arranged open pores, with their tubular hollows filled with medicines.
Inventors
- 👤 Osafumi Hidaka
- 👤 Tomoki Sakai
- 👤 Toyoaki Sakano
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 17:04
CPC Classifications
A; A61; A61K; A61K9/00; A61K9/70; A61K9/0087; A61K9/0092; A61K9/7023; A61K9/703; A61K9/7084
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
77 words
A sustained release pharmaceutical plaster which is characterized in that it is a pharmaceutical preparation comprising an adhesive compound layer and a supporter which supports the adhesive compound layer, inside of which there is an arrangement of hollow fibers, that have radially arranged open pores, with their tubular hollows filled with medicines, wherein 10% to 95% of the total surface area of all the filaments of the hollow fibers do not adhere to the adhesive compound layer.
Claim 2
Dependent Claim
77 words
A sustained release pharmaceutical plaster which is characterized in that it is a pharmaceutical preparation comprising an adhesive compound layer and a supporter which supports the adhesive compound layer, inside of which there is an arrangement of hollow fibers, that have radially arranged open pores, with their tubular hollows filled with medicines, wherein 10% to 95% of the total surface area of all the filaments of the hollow fibers do not adhere to the adhesive compound layer.
Claim 3
Dependent Claim
25 words
A sustained release pharmaceutical plaster according to claim 1, wherein said medicines are ones that vaporize or are sublimated when applied to the human body.
Claim 4
Dependent Claim
42 words
A sustained release pharmaceutical plaster according to claim 2, wherein said medicines that vaporize or are sublimated when applied to human body are nitric esters of isosorbide, halomethane, chloral hydrate, guaiazulene, methol, camphor, clenbuterol hydrochloride, salicyclic esters, or vitamin D 3 derivatives.
Claim 5
Dependent Claim
25 words
A sustained release pharmaceutical plaster according to claim 1, wherein said hollow fibers are in the structural form of a woven, knitted, or nonwoven fabric.
Claim 6
Dependent Claim
18 words
A sustained release pharmaceutical plaster according to claim 1, wherein said hollow fibers are made from polethylene terphthalate.
Claim 7
Dependent Claim
24 words
A sustained release pharmaceutical plaster according to claim 1, wherein said supporter is a film having a thickness of 0.5 micron to 4.9 microns.
Claim 8
Dependent Claim
57 words
A sustained release pharmaceutical plaster according to claim 1, wherein said adhesive compound layer is one made of acrylic resins comprising (a) at least 50 to 98 mole % of (meth)acrylic alkyl ester having an alkyl group of carbon number of 4 or more and (b) 2 to 50 mole % of acrylic acid and/or methacrylic acid.
Claim 9
Dependent Claim
50 words
A sustained release pharmaceutical plaster according to claim 1, wherein the total residue amount of solvents used in preparation of the plaster remaining in the adhesive compound layer, inclusive of the hollow fibers, is less than 50 ppm of the weight of the adhesive compound layer including the hollow fibers.
References Cited (Backward Citations)
US4675009A
Cited
JPS56145215A
Cited
JPS5731611A
Cited
JPS5786317A
Cited
JPS5984855A
Cited
JPS5984815A
Cited
US4695465A
Cited
US4693776A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1992-01-31 | 1992-08-01 | 1993-01-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1996-01-31 | 1996-08-01 | 1997-01-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2000-01-31 | 2000-08-01 | 2001-01-31 | $7700.00 | Window Closed / Lapsed |