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:
Feb. 20, 1996
Filed:
Mar. 23, 1994
Applicant:
Inventors:
Peter R Byron, Richmond, VA (US);
Frank E Blondino, Richmond, VA (US);
Assignees:
The Center for Innovative Technology, Herndon, VA (US);
Virginia Commonwealth University, Richmond, VA (US);
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
A61K / ;
U.S. Cl.
CPC ...
424 45 ; 424 46 ; 252305 ; 514958 ;
Abstract
Metered dose inhaler (MDI) formulations which utilize 1,1,1,2-tetrafluoroethane (HFC 134a) as the sole propellant are made practical by including a polar surfactant such as polyethylene glycol, diethylene glycol monoethyl ether, polyoxyethylene (20) sorbitan monolaurate, polyoxyethylene (20) sorbitan monooleate, propoxylated polyethylene glycol, and polyoxyethylene (4) lauryl ether for suspending, solubilizing, wetting and emulsifying the drug constituent and lubricating the valve components of the MDI.