Patents by Inventor Clark R. Carpenter

Clark R. Carpenter 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).

  • Preparation of .alpha.,.beta.-unsaturated carboxylic acids via Mannich intermediates
    Patent number: 4146735
    Abstract: A process for the preparation of a .alpha.,.beta.-unsaturated carboxylic acid by reacting formaldehyde, another aldehyde and a mineral acid salt of a secondary amine to form an intermediate Mannich base salt; oxidizing the Mannich base salt to the corresponding aminoacid salt; thermally cracking the aminoacid salt to yield an aqueous reaction products mixture of an .alpha.,.beta.-unsaturated carboxylic acid and the mineral acid salt of the secondary amine; and separating and isolating the aqueous reaction products.
    Type: Grant
    Filed: May 16, 1977
    Date of Patent: March 27, 1979
    Assignee: Rohm and Haas Company
    Inventors: Clark R. Carpenter, James S. Clovis
  • Process for the preparation of substituted vinylbenzyl chloride
    Patent number: 3962357
    Abstract: An improved continous single step vapor phase process for the preparation of substituted vinylbenzyl chloride from substituted ethyltoluene is disclosed. In this process a substituted ethyltoluene is reacted with a halogen gas in the vapor phase, at elevated temperatures via a continuous feed process. Furthermore, this process achieves halogenation followed by dehydrohalogenation in a single pass through the reactor. There is also obtained a very high total selectivity to vinylbenzyl chloride and its precursors via this continuous process.
    Type: Grant
    Filed: July 1, 1974
    Date of Patent: June 8, 1976
    Assignee: Rohm and Haas Company
    Inventors: Richard F. Merritt, Clark R. Carpenter