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. 03, 2019
Filed:
Oct. 28, 2014
Becton, Dickinson and Company, Franklin Lakes, NJ (US);
Shishir Prasad, Ridgewood, NJ (US);
Gheorghe Cojocariu, Bridgewater, NJ (US);
Sathya Kaliyamoorthy, Morris Plains, NJ (US);
Chad Smith, Oak Ridge, NJ (US);
Ankur Kulshrestha, Hillsborough, NJ (US);
Richard G. Giddes, Edison, NJ (US);
Gerald Bonczynski, Columbus, NE (US);
Kweku Addae-Mensah, Hackensack, NJ (US);
Becton, Dickinson and Company, Franklin Lakes, NJ (US);
Abstract
A thermoplastic elastomer stopper that meets the desired material properties of a stopper for a syringe assembly is disclosed. The compression set of the thermoplastic elastomer stopper of the present disclosure is ≤50% when measured at 25% compression for 22 hrs at 70 degree C. The hardness of the thermoplastic elastomer stopper of the present disclosure is 40-70 Shore A. The viscosity of a thermoplastic elastomer stopper of the present disclosure is ≥70 Pa·s at 1,000 sshear rate, ≥12.0 Pa·s at 10,000 sshear rate, and ≥3.0 Pa·s at 50,000 sshear rate when measured using a capillary rheometer at 205 degree C. (Die: Roundhole 20 mm length/1 mm diameter/180 degree inlet, Piston: d=15 mm, and melting time=7 min). The present non-lubricated stopper exhibits the required functional performance of a lubricated stopper.