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:
Oct. 16, 1990
Filed:
Apr. 20, 1987
Applicant:
Inventors:
Emanuel Calenoff, Burlingame, CA (US);
Myron A Beigler, Los Altos Hills, CA (US);
Gerald L Friesen, Vacaville, CA (US);
James L Nichols, Los Altos, CA (US);
Assignee:
Minnesota Mining and Manufacturing Company, St. Paul, MN (US);
Primary Examiner:
Int. Cl.
CPC ...
A61K / ; A61K / ; A61K / ;
U.S. Cl.
CPC ...
424 91 ; 424 88 ; 424 92 ; 424 95 ; 514-2 ; 514-8 ; 530322 ; 530370 ; 530395 ; 530413 ; 530414 ;
Abstract
A storage-stable, high potency allergenic extract is prepared by ultrafiltration, retaining fractions having molecular weights of from 1000 to 100,000, and drying the retained fraction to a moisture content of less than one weight percent. The extract can also be pretreated with amylase before ultrafiltration, treated with affinity chromatography before drying, and/or treated with gamma radiation after drying.