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:
Dec. 28, 2004
Filed:
Jun. 27, 2002
Implantable devices and methods for treatment of pain by delivery of fentanyl and fentanyl congeners
Randolph Mellus Johnson, Half Moon Bay, CA (US);
Felix Theeuwes, Los Altos Hills, CA (US);
Edward M. Gillis, Cupertino, CA (US);
Dana Litmanovitz, Sunnyvale, CA (US);
Barbara Laidlaw, San Jose, CA (US);
James Brown, Los Gatos, CA (US);
John Culwell, San Francisco, CA (US);
James A. Filice, Los Gatos, CA (US);
Peter Wickman, San Francisco, CA (US);
Su-Il Yum, Los Altos, CA (US);
Andrew Poutiatine, Redwood City, CA (US);
John Dinka, Fairfax, VA (US);
Durect Corporation, Cupertino, CA (US);
Abstract
The invention features devices and methods for treatment of pain. The drug delivery device is a drug delivery system adapted for whole implantation in a subject and to provide pain relief by delivery of fentanyl or a fentanyl congener (e.g., sufentanil) over a protracted period of time (e.g., at least 3 days or more than 3 days). The device comprises a housing defining a reservoir that contains a drug formulation, a pump operatively connected to the housing so as to facilitate movement of drug out of the reservoir and out of the device, and a thermal expansion element which defines a flow pathway comprising a thermal expansion channel to accommodate thermal expansion of formulation in the reservoir. The device can further comprise a valve positioned within the flow pathway so as to prevent movement of drug out of the reservoir prior to use.