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:
Aug. 10, 1999
Filed:
Jan. 14, 1998
Masahiko Kato, Amagasaki, JP;
Nobuo Tanaka, Mishima-gun, JP;
Muneo Nonomura, Toyonaka, JP;
Makoto Kakiuti, Takahagi, JP;
Takeda Chemical Industries, Ltd., Osaka, JP;
Abstract
A two-compartment type prefilled syringe includes a first rubber stopper fitted into a front sleeve, a second rubber stopper fitted into a rear end portion of a cartridge, a third rubber stopper for hermetically dividing the interior of the cartridge into front and rear compartments and a bypass formed by radially outwardly bulging a portion of a peripheral wall of the cartridge. In an axial direction of the cartridge, a length of the third rubber stopper is slightly smaller than an inner length of the bypass. When the third rubber stopper has been displaced into the bypass, the sealing property of the rear compartment with the front compartment is cancelled such that the dissolving agent, suspension or the like in the rear compartment is carried, via the bypass, into the front compartment containing dry medicament or the like. A ratio of a maximum width of one end of the bypass adjacent to the front sleeve to a maximum width of the other end of the bypass adjacent to the rear end portion of the cartridge is set to range from 1.2 to 5.0.