Patents by Inventor Lawrence James Ross

Lawrence James Ross 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).

  • Catalytic dehydrogenation process for the preparation of 3,4,5-trisubstituted pyrazoles
    Patent number: 4014896
    Abstract: There is provided a process for the preparation of 3,5-disubstituted pyrazoles which involves:A. the reaction of a methyl ketone, such as acetophenone or an appropriate derivative thereof, with an appropriate aldehyde, such as benzaldehyde in the presence of base to form a 1,3-disubstituted .alpha.,.beta.-unsaturated ketone, such as chalcone or a substituted chalcone,B. the acidification of said .alpha.,.beta.-unsaturated ketone, followed by treatment of the acidified reaction mixture with hydrazine to form a disubstituted pyrazoline, andC. the catalytic dehydrogenation of said pyrazoline to yield the desired 3,5-disubstituted pyrazole.
    Type: Grant
    Filed: January 8, 1976
    Date of Patent: March 29, 1977
    Assignee: American Cyanamid Company
    Inventors: Murray Garber, Lawrence James Ross, Walter Joseph Stepek
  • Process for producing amino G acid and amino J acid from tobias acid
    Patent number: 3979445
    Abstract: A novel process for producing 2-amino-6,8-naphthalenedisulfonic acid (Amino G Acid) and 2-amino-5,7-naphthalenedisulfonic acid (Amino J Acid) which comprises heating 2-amino-1-naphthalenesulfonic acid (Tobias Acid) in 100% sulfuric acid, sulfonating the heated mixture with sulfur trioxide at a temperature in the range of 90.degree.C. to 150.degree.C. and hydrolyzing the sulfonation product.
    Type: Grant
    Filed: September 19, 1975
    Date of Patent: September 7, 1976
    Assignee: American Cyanamid Company
    Inventor: Lawrence James Ross
  • Catalytic dehydrogenation process for the preparation of 3,5-disubstituted pyrazoles
    Patent number: 3952010
    Abstract: There is provided a process for the preparation of 3,5-disubstituted pyrazoles which involves:A. the reaction of a methyl ketone, such as acetophenone or an appropriate derivative thereof, with an appropriate aldehyde, such as benzaldehyde in the presence of base to form a 1,3-disubstituted .alpha.,.beta.-unsaturated ketone, such as chalcone or a substituted chalcone,B. the acidification of said .alpha.,.beta.-unsaturated ketone, followed by treatment of the acidified reaction mixture with hydrazine to form a disubstituted pyrazoline, andC. the catalytic dehydrogenation of said pyrazoline to yield the desired 3,5-disubstituted pyrazole.
    Type: Grant
    Filed: February 12, 1975
    Date of Patent: April 20, 1976
    Assignee: American Cyanamid Company
    Inventors: Murray Garber, Lawrence James Ross, Walter Joseph Stepek