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. 10, 2005
Filed:
Jul. 15, 2002
Charles E. Lee, Union City, CA (US);
Jung-chung Lee, Sunnyvale, CA (US);
Charles E. Lee, Union City, CA (US);
Jung-Chung Lee, Sunnyvale, CA (US);
Cellegy Pharmaceuticals, Inc., So. San Francisco, CA (US);
Abstract
A dispensing device includes a hollow body coupled to a pump mechanism having a dip tube, and to a follower piston. A well provided in the piston is generally larger in diameter than the dip tube to allow fluid in the chamber to flow down into the well as the dip tube enters the well to facilitate fluid removal after a significant portion of the fluid has been removed. In some aspects, the well walls and dip tube end are substantially conical shaped with the well walls substantially parallel to the dip tube end or having a greater angle relative to the axis of the dip tube