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:
Apr. 13, 1993
Filed:
Jan. 22, 1992
Applicant:
Inventors:
Richard N Dalby, Richmond, VA (US);
Peter R Byron, Richmond, VA (US);
Assignee:
Virginia Commonwealth University, Richmond, VA (US);
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
A61L / ;
U.S. Cl.
CPC ...
424 45 ; 424 43 ; 252305 ;
Abstract
Beclomethasone diproprionate (BDP) forms a clathrate with HCFC-123, dimethyl ether (DME) and HCFC-141b which are less harmful propellants than the CFC propellants currently used in metered dose inhalers (MDIs). The clathrate can be remicronized and suspended for use in an MDI. BDP also is completely dissolved by DME based propellant blends and certain HCFC 123 propellant blends. Using propellant blends which completely dissolve BDP will assure more efficient dosing with an MDI.