Patents by Inventor Albert R. Reid

Albert R. Reid 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).

  • Carboxymethyl hydrophobically modified hydroxyethylcellulose
    Patent number: 4826970
    Abstract: New anianic, water-soluble cellulose ether derivatives, in particular, carboxymethyl hydrophobically modified hydroxyethylcellulose (CMHMHEC), which are useful as thickeners in aqueous solutions, e.g., water-based protective coating compositions such as latex paints, as well as aqueous solutions, including water-based protective coating compositions containing these ternary cellulose ethers as thickeners and protective coloids, are disclosed. The cellulose ether derivatives are characterized in that they have a Brookfield LVF Viscosity of about 5 centipoise to about 60,000 centipoise in a 1 weight % solution.
    Type: Grant
    Filed: September 17, 1987
    Date of Patent: May 2, 1989
    Assignee: Hercules Incorporated
    Inventors: Albert R. Reid, Richard D. Royce, Jr.
  • Dihydroxypropyl mixed ether derivatives of cellulose
    Patent number: 4523010
    Abstract: Disclosed are nonionic dihydroxypropyl hydroxyalkylcelluloses having a dihydroxypropyl M.S. of from about 0.1 to 1.2 and a hydroxyalkyl M.S. of from about 1.5 to about 3.0. The dihydroxypropyl hydroxyalkylcelluloses are capable of reacting with polyvalent metal cations, such as, titanium and zirconium, in an aqueous medium, such as a salt brine medium, to form viscoelastic gels useful in oil recovery operations.
    Type: Grant
    Filed: June 15, 1984
    Date of Patent: June 11, 1985
    Assignee: Hercules Incorporated
    Inventors: Carl Lukach, Thomas G. Majewicz, Albert R. Reid
  • Superabsorbent cellulosic fibers having a coating of a water insoluble, water absorbent polymer and method of making the same
    Patent number: 4128692
    Abstract: Products having high absorbency for use in absorbent dressings and the like are prepared by precipitating a water-insoluble but water-swellable superabsorbent polymer onto the surface of a long fiber cellulose from an aqueous slurry and drying the resulting coated fibers by dehydration with a water-miscible nonsolvent for the polymer.
    Type: Grant
    Filed: May 25, 1977
    Date of Patent: December 5, 1978
    Assignee: Hercules Incorporated
    Inventor: Albert R. Reid
  • Dihydroxypropyl cellulose
    Patent number: 4096326
    Abstract: Dihydroxypropyl ethers of cellulose are disclosed which are characterized by having a dihydroxypropyl M.S. of at least about 1.4 which are water-soluble and thermoplastic. These materials form complexes with borate and antimonate ions having unique and useful properties.
    Type: Grant
    Filed: October 13, 1976
    Date of Patent: June 20, 1978
    Assignee: Hercules Incorporated
    Inventor: Albert R. Reid
  • Highly absorbent modified polysaccharides
    Patent number: 4028290
    Abstract: Modified polysaccharides having greatly increased water-absorbing and binding capacity are prepared by reacting a polysaccharide such as cellulose or starch in the presence of acrylamide, another vinyl monomer and a divinyl crosslinking monomer using free radical polymerization techniques. The product is believed to be a complex mixture of crosslinked grafted polysaccharide and acrylamide copolymers.
    Type: Grant
    Filed: October 23, 1975
    Date of Patent: June 7, 1977
    Assignee: Hercules Incorporated
    Inventor: Albert R. Reid