Patents by Inventor Richard W. Walter, Jr.

Richard W. Walter, Jr. 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).

  • Low color and low haze formulations of sodium o-phenylphenate
    Patent number: 6362152
    Abstract: A color stable aqueous solution containing a relatively high concentration of sodium o-phenylphenate is described where stabilizing components include an oxygen scavenger and a free radical scavenger. The aqueous solutions of NaOPP prepared according to the present invention exhibit an absorbance at 400 nanometers of at most one-half the absorbance exhibited by untreated solutions after incubation for 72 hours at 44° C. and 4 hours under ultraviolet light. The aqueous solution is useful as a concentrate that can be diluted to a desirable antimicrobial concentration level prior to application.
    Type: Grant
    Filed: April 7, 2000
    Date of Patent: March 26, 2002
    Assignee: The Dow Chemical Company
    Inventors: Tracy L. Young, Charles D. Gartner, Dawn L. Carsten, Richard W. Walter, Jr.
  • Iodones and methods for antimicrobial use
    Patent number: 5106407
    Abstract: The present invention discloses the antimicrobial utility of certain iodonium ylide compounds. The particular iodonium ylide compounds are phenyl iodonium ylides having an ortho substituent that stabilizes the positive charge on the polyvalent iodine by a nonbonded electrostatic interaction. The polyvalent iodine is further stabilized by a cyclic 1,3-dicarbonyl anion.
    Type: Grant
    Filed: December 4, 1989
    Date of Patent: April 21, 1992
    Assignee: The Dow Chemical Company
    Inventors: Attila G. Relenyi, Gerald F. Koser, Richard W. Walter, Jr., William J. Kruper, Jr., Ravi B. Shankar, Anthony P. Zelinko
  • Control of biofouling at alkaline pH and/or high water hardness with certain alkylthioalkylamines
    Patent number: 4816061
    Abstract: Disclosed is a method for inhibiting microorganisms and/or controlling biofouling of cooling towers by use of certain alkylthioalkylamines such as n-decylthioethylamine.
    Type: Grant
    Filed: October 22, 1986
    Date of Patent: March 28, 1989
    Assignee: The Dow Chemical Company
    Inventors: Richard W. Walter, Jr., Attila G. Relenyi, Robert L. Johnson