Patent · US Expired

Lyopohilization method

US6684524B1 · kind B1 · utility

21Cited by

17References

9Claims

0Family size

Assignee

BAYER HEALTHCARE LLC · DE

Inventors

Bernd Sennhenn · Leverkusen, DE
Martin S. Kramer · Clarkston, US

Key dates

Filing date	Feb 1, 2002
Grant date	Feb 3, 2004
Priority date	—
Expiry date	Feb 1, 2022

Classification

Technology area (CPC F)Mechanical Engineering; Lighting; Heating
CPC primaryF26B5/06
WIPO fieldChemical engineering
WIPO sectorChemistry

Abstract

The invention relates to a lyophilization method which comprises the following steps: reducing the pressure in the drying chamber until the onset of a visible crystallization of the solvent at a temperature in the drying chamber which is above the solidification point of the preparation; reducing the temperature in the drying chamber to a temperature which is below the solidification point of the preparation or is identical to it, until completion of the crystallization of the solvent, resulting in a frozen solvent; and sublimation of the frozen solvent by means of reduced pressure.

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