Patents by Inventor Henry Y. Lew

Henry Y. Lew 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 the preparation of a low viscosity alkyl toluene or alkyl xylene sulfonate
    Patent number: 4608204
    Abstract: A process for the preparation of a low viscosity aqueous alkyl toluene or alkyl xylene sulfonate which comprises neutralizing alkyl toluene or alkyl xylene sulfonic acid with aqueous sodium hydroxide in the presence of sufficient sodium chloride to lower the viscosity of the sulfonate salt produced. Alternatively, the sodium chloride may be added subsequent to neutralization of the sulfonic acid.
    Type: Grant
    Filed: November 13, 1985
    Date of Patent: August 26, 1986
    Assignee: Chevron Research Company
    Inventors: Henry Y. Lew, Alan E. Straus
  • Nitrothiophene-accelerated lactam polymerization
    Patent number: 4180650
    Abstract: Processes for the anionic polymerization of lactam accelerated by the presence of nitrothiophene and certain derivatives thereof. The processes are especially applicable to the preparation of poly-2-pyrrolidone which can be molded into filaments, films, and shaped articles in general.
    Type: Grant
    Filed: April 21, 1978
    Date of Patent: December 25, 1979
    Assignee: Chevron Research Company
    Inventor: Henry Y. Lew
  • Triarylmethylhalide-accelerated lactam polymerization
    Patent number: 4171426
    Abstract: Processes for the anionic polymerization of lactam accelerated by the presence of certain triarylmethyl halides. The processes are especially applicable to the preparation of poly-2-pyrrolidone which can be molded into filaments, films, and shaped articles in general.
    Type: Grant
    Filed: April 21, 1978
    Date of Patent: October 16, 1979
    Assignee: Chevron Research Company
    Inventor: Henry Y. Lew
  • Nitrobenzene-accelerated lactam polymerization
    Patent number: 4171425
    Abstract: Processes for the anionic polymerization of lactam accelerated by the presence of nitrobenzene and/or certain derivatives thereof. The processes are especially applicable to the preparation of poly-2-pyrrolidone which can be molded into filaments, films, and shaped articles in general.
    Type: Grant
    Filed: April 21, 1978
    Date of Patent: October 16, 1979
    Assignee: Chevron Research Company
    Inventor: Henry Y. Lew