US4990340A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Sustained release pharmaceutical preparation
Assignee: Teijin Ltd
•
Filing: 1987-01-21
•
Granted: 1991-02-05
•
Expires: 2007-01-21
Abstract
Abstract A sustained release pharmaceutical preparation for percutaenous administration use mainly composed of a drug layer which is a layer made to contain drugs, to have no adhesiveness to the skin, but to be used in contact with the skin.
Inventors
- 👤 Osafumi Hidaka
- 👤 Tomoki Sakai
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 11:05
CPC Classifications
A; A61; A61K; A61K9/00; A61K9/70; A61K9/7023; A61K9/703; A61K9/7084
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
62 words
A sustained release pharmaceutical preparation for percutaneous administration comprising: a support and a drug layer provided on said support, said drug layer having no adhesiveness to skin and comprising (a) a knitted fabric of hollow porous fibers of polyethylene terephthalate wherein the pores pass centrifugally from the wall of a tubular hollow to the peripheral surface of said fibers, and (b) drugs.
Claim 2
Dependent Claim
62 words
A sustained release pharmaceutical preparation for percutaneous administration comprising: a support and a drug layer provided on said support, said drug layer having no adhesiveness to skin and comprising (a) a knitted fabric of hollow porous fibers of polyethylene terephthalate wherein the pores pass centrifugally from the wall of a tubular hollow to the peripheral surface of said fibers, and (b) drugs.
Claim 3
Dependent Claim
37 words
The sustained release pharmaceutical preparation according to claim 1, wherein said support is an adhesive tape or a nonadhesive tape, on part of which an adhesive layer is established to make said support stick to the skin.
Claim 4
Dependent Claim
28 words
The sustained release pharmaceutical preparation according to claim 1 or claim 2, wherein said drugs are vasodilators for coronary vessel, antiarrhytmic agents, stenocardiac drugs, cardiotonics, or anti-hypertensive agents.
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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) | 1994-02-04 | 1994-08-06 | 1995-02-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1998-02-04 | 1998-08-06 | 1999-02-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2002-02-04 | 2002-08-06 | 2003-02-05 | $7700.00 | Window Closed / Lapsed |