×

Sustained release dosage form

  • US 5,196,202 A
  • Filed: 10/02/1989
  • Issued: 03/23/1993
  • Est. Priority Date: 09/01/1986
  • Status: Expired due to Term
First Claim
Patent Images

1. A method for preparing a controlled release form for the controlled release of an active substance, said dosage form including an adhesive layer, a reservoir containing the active substance, and a controlled release layer in contact with the reservoir, the method comprising the steps of placing said controlled release layer around a first portion of the reservoir, placing a layer impermeable to the passage of said active substance around the remaining portion of the reservoir and placing the adhesive layer over said impermeable layer wherein the impermeable layer is interposed between the reservoir and the adhesive layer.

View all claims
  • 0 Assignments
Timeline View
Assignment View
    ×
    ×