Patents by Inventor Norman A. Dahle

Norman A. Dahle has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • 3-Benzyl-2-methylimino-5-phenyl-.DELTA..sup.4 -1,3,4-thiadiazolines and method of combating undesired plant growth
    Patent number: 4104053
    Abstract: A class of 3-benzyl-2-methylimino-5-phenyl-.DELTA..sup.4 -1,3,4-thiadiazolines which may have certain specific substituents on the benzyl and phenyl rings are useful in combating various weeds in grain crops, for example, grassy weeds in wheat and rice fields.
    Type: Grant
    Filed: September 4, 1974
    Date of Patent: August 1, 1978
    Assignee: Gulf Oil Corporation
    Inventor: Norman A. Dahle, deceased
  • 3-Benzyl-2-methylimino-5-phenyl-delta-4-1,3,4-thiadiazolines
    Patent number: 4020078
    Abstract: A class of 3-benzyl-2-methylimino-5-phenyl-.DELTA..sup.4 -1,3,4-thiadiazolines which may have certain specific substituents on the benzyl and phenyl rings are useful in combating various weeds in grain crops, for example, grassy weeds in wheat and rice fields.
    Type: Grant
    Filed: February 2, 1976
    Date of Patent: April 26, 1977
    Assignee: Gulf Oil Corporation
    Inventor: Norman A. Dahle
  • Algicidol 2-chloro-5-tolyl-1,3,4-thiadiazoles
    Patent number: 3959301
    Abstract: 5-Aryl-tetrazoles may be reacted with thiophosgene to yield 2-chloro-5-aryl-1,3,4-thiadiazoles which have unusually selective phytotoxic properties, being particularly useful in combating crabgrass and algae.
    Type: Grant
    Filed: December 13, 1971
    Date of Patent: May 25, 1976
    Assignee: Gulf Research & Development Company
    Inventor: Norman A. Dahle