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. 25, 2007
Filed:
Feb. 18, 2004
Masahiko Kato, Amagasaki, JP;
Yasaburo Akagi, Takatsuki, JP;
Masahiko Kato, Amagasaki, JP;
Yasaburo Akagi, Takatsuki, JP;
Takeda Pharmaceutical Company Limited, Osaka, JP;
Abstract
A dual-chamber type prefilled syringe comprises a cylindrical body within which a front plug member, a middle plug member and an end plug member are hermetically fitted to form a first chamber and a second chamber. The cylindrical body has an inner surface formed with a bypass. When the middle plug member moves to a position where the bypass is formed, the first chamber is communicated with the second chamber for the first time via the bypass. In this beginning state of liquid transfer (S), an inner volume (VS) of the cylindrical body between a leading end of the cylindrical body and a rear end of the front plug member is set to be at least 60% of a volume (VC) of a second component. When liquid component within the second chamber flows into the first chamber, it is possible to prevent part of the liquid component from passing through the first chamber to reach a portion for attaching an injection needle at a leading end of the cylindrical body.