Patents Represented by Attorney, Agent or Law Firm W. Stanley Alexander
  • Backlighted fluorescent/retroreflective safety device
    Patent number: 6168876
    Abstract: An improved, “fail-safe” safety device comprising, in combination, a backlighted fluorescent film and a retroreflective sheet.
    Type: Grant
    Filed: March 15, 1994
    Date of Patent: January 2, 2001
    Inventors: Elizabeth M. Thorp, Stephen N. Thorp
  • Method of preparing hydroxyethyl ethers of cellulose
    Patent number: 4298728
    Abstract: In preparation of hydroxyethyl ethers of cellulose, ethylene oxide efficiency of the reaction and solubility characteristics of the product are improved by using alkali cellulose which has been prepared in the presence of boric acid or a boric acid salt.
    Type: Grant
    Filed: June 3, 1980
    Date of Patent: November 3, 1981
    Assignee: Hercules Incorporated
    Inventors: Thomas G. Majewicz, Walter S. Ropp
  • Suspension medium
    Patent number: 4155314
    Abstract: Stable suspensions of solid particles are formed by dispersing the particles in a pseudoplastic aqueous medium containing in solution xanthan gum and at least one non-ionic water-soluble polymer, exemplified by guar gum, in proportions providing an unexpectedy high ratio of yield point to plastic viscosity. The medium is especially useful in the planting of seeds which may be pre-germinated.
    Type: Grant
    Filed: March 20, 1978
    Date of Patent: May 22, 1979
    Assignee: Hercules Powder Company Limited
    Inventors: William P. O'Callaghan, Gianfranco Mecatti