Patents by Inventor Randall W. Stephens

Randall W. Stephens 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).

  • Publication number: 20210352901
    Abstract: A wood preservative composition and method for preserving wood by contacting wood with said composition comprising a polyurethane polymer, non-aqueous solvents, and a wood preservative active.
    Type: Application
    Filed: September 24, 2019
    Publication date: November 18, 2021
    Inventors: Selvanathan Arumugam, David A. Laganella, Randall W. Stephens
  • Publication number: 20210339425
    Abstract: A wood preservative composition and method for preserving wood by contacting wood with said composition comprising a polyurethane polymer, non-aqueous solvents, and a wood preservative active.
    Type: Application
    Filed: September 28, 2019
    Publication date: November 4, 2021
    Inventors: Selvanathan Arumugam, David A. Laganella, Randall W. Stephens
  • Publication number: 20210337785
    Abstract: A method for preserving wood by contacting wood with a composition comprising a polyurethane polymer, non-aqueous solvents, and a wood preservative.
    Type: Application
    Filed: September 24, 2019
    Publication date: November 4, 2021
    Inventors: Selvanathan Arumugam, David A. Laganella, Randall W. Stephens
  • Publication number: 20210337784
    Abstract: A wood preservative composition and method for preserving wood by contacting wood with said composition comprising a polyurethane polymer, non-aqueous solvents, and a wood preservative active.
    Type: Application
    Filed: September 24, 2019
    Publication date: November 4, 2021
    Inventors: Selvanathan Arumugam, David A. Laganella, Randall W. Stephens
  • Patent number: 10098341
    Abstract: A composition comprising: (a) tetrakis(hydroxymethyl)phosphonium sulfate (THPS); (b) water; and (c) methanol; wherein the weight percentages of (a), (b) and (c) are within the area on a ternary phase diagram for (a), (b) and (c) bounded by four points: (A) 5% THPS/58% water/37% methanol; (B) 5% THPS/36% water/59% methanol; (C) 65% THPS/27% water/8% methanol; and (D) 65% THPS/29% water/6% methanol.
    Type: Grant
    Filed: March 15, 2016
    Date of Patent: October 16, 2018
    Assignee: ROHM AND HAAS COMPANY
    Inventor: Randall W. Stephens
  • Patent number: 9988360
    Abstract: A method for preparation of 2-methyl-1,2-benzisothiazolin-3-one from 1,2-benzisothiazolin-3-one by contacting 1,2-benzisothiazolin-3-one with an alkali metal hydroxide and dimethyl sulfate.
    Type: Grant
    Filed: November 11, 2015
    Date of Patent: June 5, 2018
    Assignee: ROHM AND HAAS COMPANY
    Inventor: Randall W. Stephens
  • Publication number: 20180042221
    Abstract: A composition comprising: (a) tetrakis(hydroxymethyl)phosphonium sulfate (THPS); (b) water; and (c) 1,2-propanediol; wherein the weight percentages of (a), (b) and (c) are within the area on a ternary phase diagram for (a), (b) and (c) bounded by five points: (A) 20% THPS/40% water/40% 1,2-propanediol; (B) 20% THPS/20% water/60% 1,2-propanediol; (C) 65% THPS/22% water/13% 1,2-propanediol; (D) 65% THPS/25% water/10% 1,2-propanediol; and (E) 40% THPS/28% water/32% 1,2-propanediol.
    Type: Application
    Filed: March 15, 2016
    Publication date: February 15, 2018
    Inventors: Randall W. Stephens, Eileen F. Warwick
  • Publication number: 20180042222
    Abstract: A composition comprising: (a) tetrakis(hydroxymethyl)phosphonium sulfate (THPS); (b) water; and (c) methanol; wherein the weight percentages of (a), (b) and (c) are within the area on a ternary phase diagram for (a), (b) and (c) bounded by four points: (A) 5% THPS/58% water/37% methanol; (B) 5% THPS/36% water/59% methanol; (C) 65% THPS/27% water/8% methanol; and (D) 65% THPS/29% water/6% methanol.
    Type: Application
    Filed: March 15, 2016
    Publication date: February 15, 2018
    Inventor: Randall W. Stephens
  • Publication number: 20170320840
    Abstract: A method for preparation of 2-methyl-1,2-benzisothiazolin-3-one from 1,2-benzisothiazolin-3-one by contacting 1,2-benzisothiazolin-3-one with an alkali metal hydroxide and dimethyl sulfate.
    Type: Application
    Filed: November 11, 2015
    Publication date: November 9, 2017
    Inventor: Randall W. Stephens
  • Publication number: 20150291541
    Abstract: A method for preparation of 2-alkyl-1,2-benzisothiazolin-3-ones from 1,2-benzisothiazolin-3-one by contacting 1,2-benzisothiazolin-3-one with a dialkyl carbonate in the presence of a base.
    Type: Application
    Filed: November 19, 2013
    Publication date: October 15, 2015
    Inventors: Mark V. M. Emonds, Daniel R. Henton, Randall W. Stephens
  • Patent number: 9139540
    Abstract: A method for preparation of 2-alkyl-1,2-benzisothiazolin-3-ones from 1,2-benzisothiazolin-3-one by contacting 1,2-benzisothiazolm-3-one with a dialkyl carbonate in the presence of a base.
    Type: Grant
    Filed: November 19, 2013
    Date of Patent: September 22, 2015
    Assignees: Dow Global Technologies LLC, Rohm and Haas Company
    Inventors: Mark V. M. Emonds, Daniel R. Henton, Randall W. Stephens