Patent · US Active

Piston for a cartridge for use in a drug delivery device

US9572939B2 · kind B2 · utility

0Cited by

1References

11Claims

0Family size

Assignee

Sanofi-Aventis Deutschland GMBH · DE

Inventors

Ramatullah Qurishi · Frankfurt am Main, DE
Martin Otten · Frankfurt am Main, DE
Stefan Trinkle · Stuttgart, DE
Jörn Möckel · Dossenheim, DE
Sebastian Thiel · Buxtehude, DE

Key dates

Filing date	Nov 1, 2012
Grant date	Feb 21, 2017
Priority date	—
Expiry date	May 19, 2033

Classification

Technology area (CPC A)Human Necessities
CPC primaryA61M2207/10
WIPO fieldMedical technology
WIPO sectorInstruments

Abstract

The present invention relates to a piston for a cartridge to be filled with a medicament, the piston comprising: a first piston member comprising a first material and forming a distal end face of the piston, a second piston member comprising a second material of lower compressibility compared to the first material, wherein the second piston member is arranged in a cupped receptacle of the first piston member and provides a thrust receiving surface at a proximal end of the piston.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.