Patent US4990340A successfully refreshed from Google Patents.
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 12:16
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.
References Cited (Backward Citations)
US4175326A
Cited
EP0013606B1
Cited
JPS56145215A
Cited
US4297995A
Cited
JPS5731611A
Cited
FR2527450A1
Cited
JPS5984815A
Cited
EP0113562A1
Cited
EP0139127A1
Cited
US4764377A
Cited
EP0168862A2
Cited
US4801458A
Cited
US4713243A
Cited
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 |