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:
Dec. 05, 1989
Filed:
Dec. 05, 1984
Applicant:
Inventors:
Assignee:
Allelix, Inc., Mississauga, CA;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C12N / ; C12N / ; C12P / ;
U.S. Cl.
CPC ...
4351723 ; 435 691 ; 4351721 ; 435254 ; 435320 ; 935 55 ; 935 56 ; 935 68 ;
Abstract
Transformants of Aspergillus niger and related Aspergilli, containing foreign DNA conferring modified properties of expression thereon, are prepared by use of a DNA vector which contains a selectable marker which is capable of incorporation into the DNA of the host A. niger cells, but which is not to be found in the A. niger cells prior to this transformation. The vector also contains other foreign DNA to be incorporated into the A. niger, for modified expression. The process suitably uses mutants of A. niger as hosts, the mutants lacking the selectable marker as compared with wild type A. niger, and conducts the transformation on spheroplasts of A. niger.