The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
May. 04, 2004
Filed:
Apr. 16, 2002
Richard Ting, Danville, CA (US);
Charles Hsiao, Livermore, CA (US);
Impax Pharmaceuticals, Inc., Hayward, CA (US);
Abstract
A press-coated tablet suitable for oral administration, comprising an immediate-release compartment comprising a compressed blend of an active agent. The immediate-release compartment has a dissolution profile in which 10-75% of the active agent is dissolved within one hour and not less than 90% of the active agent is dissolved within 6 hours. The tablet further comprises an extended-release compartment with a dissolution profile in which 5-40% of the active agent is dissolved within one hour, 20-75% within three hours, 40-95% of the active agent within 6 hours, and not less than 60% of the active agent is dissolved within 8 hours. Additionally, the press-coated extended-release compartment substantially envelops the immediate-release compartment, and comprises a compressed blend of the active agent, a hydrophilic polymer and hydrophobic material. The tablet exhibits a first order release of the active agent interrupted by a pulsed delivery of the active agent.