Patents by Inventor Craig Leake

Craig Leake 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).

  • Corrugating adhesive containing soluble high amylose starch
    Patent number: 5286769
    Abstract: Corrugating adhesive compositions comprising soluble high amylose starch as the carrier starch may be prepared as a one-piece, dry mixture that can be dispersed in water at 25.degree. to 55.degree. C. and applied to paperboard without further preparation steps. The corrugating adhesives may be prepared without alkali, and used at any pH.
    Type: Grant
    Filed: April 19, 1993
    Date of Patent: February 15, 1994
    Assignee: National Starch and Chemical Investment Holding Corporation
    Inventors: James Eden, James Kasica, Craig Leake, Norman Lacourse, Paul Altieri
  • Corrugating adhesive containing soluble high amylose starch
    Patent number: 5236977
    Abstract: Corrugating adhesive compositions comprising soluble high amylose starch as the carrier starch may be prepared as a one-piece, dry mixture that can be dispersed in water at 25.degree. to 55.degree. C. and applied to paperboard without further preparation steps. The corrugating adhesives may be prepared without alkali, and used at any pH.
    Type: Grant
    Filed: September 20, 1991
    Date of Patent: August 17, 1993
    Assignee: National Starch and Chemical Investment Holding Corporation
    Inventors: James Eden, James Kasica, Craig Leake, Norman Lacourse, Paul Altieri
  • Process of using starch based corrugating adhesives
    Patent number: 4978411
    Abstract: This invention presents starch-based alkaline corrugating adhesives having improved green bond strength due to the use of undried starch as the raw starch component in the adhesive. Such adhesives can be used in corrugation processes at much higher corrugator running speeds than the conventionally employed adhesives.
    Type: Grant
    Filed: January 16, 1990
    Date of Patent: December 18, 1990
    Assignee: National Starch and Chemical Investment Holding Corporation
    Inventors: Craig Leake, Michael Foran, Jeffrey G. Atkinson
  • Starch based corrugating adhesives
    Patent number: 4912209
    Abstract: This invention presents starch-based alkaline corrugating adhesives having improved green bond strength due to the use of undried starch as the raw starch component in the adhesive. Such adhesives can be used in corrugation processes at much higher corrugator running speeds than the conventionally employed adhesives.
    Type: Grant
    Filed: June 15, 1988
    Date of Patent: March 27, 1990
    Assignee: National Starch and Chemical Corporation
    Inventors: Craig Leake, Michael Foran, Jeffrey G. Atkinson
  • Polysaccharide derivatives containing aldehyde groups on an aromatic ring, their preparation from the corresponding acetals and use in paper
    Patent number: 4788280
    Abstract: Polysaccharide aldehydes having the formula ##STR1## or Sacch--O--CH.sub.2 --Ar--CHO (II) such as starch, cellulose, and gum aldehydes, are useful as paper additives for imparting strength and as the granular or gelatinized portion of a corrugating adhesive. Those having formula I are prepared by a nonoxidative method which involves reacting the polysaccharide base, in the presence of alkali, with a derivatizing acetal reagent having the general structure ##STR2## and then hydrolyzing the acetal by adjusting the pH to less than 7, preferably 2-4. In the formula Ar is an aryl group, optionally containing an ether linkage, or an alkaryl group and A and A' are lower alkyls or together form at least a 5-membered cyclic acetal. The polysaccharide aldehydes are crosslinked by the addition of selected polyfunctional crosslinkers such as an aliphatic primary polyamine or polyketone.
    Type: Grant
    Filed: September 8, 1987
    Date of Patent: November 29, 1988
    Assignee: National Starch and Chemical Corporation
    Inventors: Robert L. Billmers, Martin M. Tessler, David M. Del Giudice, Craig Leake