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:
May. 08, 2001
Filed:
Dec. 09, 1998
Zhengfeng Zhang, Tutzing, DE;
Martin Knoch, Berg, DE;
Pari GmbH Spezialisten fur Effektive Inhalation, Starnberg, DE;
Abstract
Propellant mixtures and medicament aerosols which contain them are described for micronizing medicaments for pulmonary use. The propellant mixture is in a subcritical state and contains at least one component from a first class of propellant gasses and at least one component from a second class of propellant gasses. The first class includes propellant gasses with an evaporation enthalpy of 200 kJ/kg or less at 25° C. and a vapor pressure of 20 bars or more at 25° C., and the second class includes propellant gasses with an evaporation enthalpy of 300 kJ/kg or more at 25° C. and a vapor pressure of 10 bars or less at 25° C. By using this propellant mixture in a medicament aerosol, micronized medicaments are obtained in which approximately 80% by weight of the generated particles have less than 8 &mgr;m diameter.