Patents by Inventor Charles C. Cumbo

Charles C. Cumbo 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).

  • Process for preparing alkanediols by electrochemical coupling of halohydrins
    Patent number: 4324625
    Abstract: The invention relates to a process for the preparation of alkanediols by the electrochemical coupling of a halohydrin in a divided electrolytic cell having a copper cathode, in an aqueous system whose catholyte contains copper ions and a ligand.
    Type: Grant
    Filed: July 29, 1980
    Date of Patent: April 13, 1982
    Assignee: E. I. Du Pont de Nemours and Company
    Inventor: Charles C. Cumbo
  • Production of butanediol
    Patent number: 4024197
    Abstract: 2-VINYL-5-METHYL-1,3-DIOXANE IS PROVIDED AS A NEW CYCLIC ACETAL WHICH, WHEN HYDROFORMYLATED, HYDROLYZED AND HYDROGENATED PROVIDES HIGH YIELDS OF A MIXTURE OF 1,4-BUTANEDIOL AND 2-METHYL-1,3-PROPANEDIOL.
    Type: Grant
    Filed: December 31, 1975
    Date of Patent: May 17, 1977
    Assignee: E. I. Du Pont de Nemours and Company
    Inventors: Charles C. Cumbo, Kamlesh K. Bhatia
  • 2-Vinyl-5-methyl-1,3-dioxane
    Patent number: 3963754
    Abstract: 2-Vinyl-5-methyl-1,3-dioxane is provided as a new cyclic acetal which, when hydroformylated, hydrolyzed and hydrogenated provides high yields of a mixture of 1,4-butanediol and 2-methyl-1,3-propanediol.
    Type: Grant
    Filed: July 31, 1974
    Date of Patent: June 15, 1976
    Assignee: E. I. Du Pont de Nemours and Company
    Inventors: Charles C. Cumbo, Kamlesh K. Bhatia
  • Mixture of 2(2'-propanal)-5-methyl-1,3-dioxane and 2(3'-propanal)-5-methyl-1,3-dioxane
    Patent number: 3963755
    Abstract: 2(2'-PROPANAL)-5-METHYL-1,3-DIOXANE AND 2(3'-PROPANAL)-5-METHYL-1,3-DIOXANE ARE PROVIDED AS NEW CYCLIC ACETAL-ALDEHYDES WHICH, WHEN HYDROLYZED AND HYDROGENATED, PROVIDE HIGH YIELDS OF A MIXTURE OF 1,4-BUTANEDIOL AND 2-METHYL-1,3-PROPANEDIOL.
    Type: Grant
    Filed: July 31, 1974
    Date of Patent: June 15, 1976
    Assignee: E. I. Du Pont de Nemours and Company
    Inventors: Charles C. Cumbo, Kamlesh K. Bhatia
  • Process for the preparation of an olated chromium (III) nitrate
    Patent number: 3950506
    Abstract: Olated chromium (III) nitrate is obtained by dissolving hexaaquochromium (III) nitrate in a C.sub.1 -C.sub.4 alcohol or in tetrahydrofuran, any of them containing less than about 10% of water. The preferred alcohol is isopropyl alcohol. The preparation can also start with chromium trioxide, which is reduced to chromium (III) nitrate by a reducing alcohol, such as isopropyl alcohol, in the presence of nitric acid. Alternatively, the reduction can be accomplished in a nonreducing organic solvent, such as tetrahydrofuran, by hydrogen peroxide in the presence of nitric acid. Highly olated chromium nitrate is an excellent coupling agent for reinforced thermoplastic composites. Olation in the presence of a carboxylic acid or addition of a carboxylic acid to the olated chromium (III) nitrate gives carboxylic acid-olated chromium (III) nitrate complexes, which are useful as coupling agents or as mold release agents.
    Type: Grant
    Filed: July 9, 1973
    Date of Patent: April 13, 1976
    Inventor: Charles C. Cumbo