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. 14, 1991
Filed:
Sep. 20, 1989
Donald D Solomon, Spring Valley, OH (US);
Mutlu Karakelle, Dayton, OH (US);
Richard W Beck, Centerville, OH (US);
Becton, Dickinson and Company, Franklin Lakes, NJ (US);
Abstract
An oburator includes a solid substantially stiff rod of a nonhydrophilic polymer coated with a layer of a hydrophilic polyurethane which may have an antithrombogenic agent bulk distributing therein. When the hydrophilic polyurethane comes into contact with an aqueous liquid such as water, saline or a body fluid, it absorbs the liquid and expands thereby enlarging the diameter of the obturator. Another aspect of the invention is an assembly of a catheter and the obturator of the invention. When the obturator is emplaced in the catheter and brought into contact with a liquid, it expands, releases the antithrombogenic agent and contacts the lumen wall of the catheter thereby forming a seal which prevents backflow of a body fluid.