Patents by Inventor Merlyn C. Pasion

Merlyn C. Pasion 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).

  • Processes and compositions to enhance the tensile strength of reclaimed sand bonded with alkaline resins
    Patent number: 5089540
    Abstract: The present invention provides methods for treating reclaimed sand obtained from dismantled foundry molds and cores which contain residue from a cured binder of an ester-cured alkaline phenolic resin. Treatment of the reclaimed sand with a silane solution containing one or more amines, particularly an aqueous solution containing a silane and one or more amines, enhances the tensile strengths of foundry molds and cores produced therefrom relative to those obtained with untreated reclaimed sand. Methods for producing foundry cores and molds which incorporate such a treatment process are also provided by this invention, as are raw batch formulations.
    Type: Grant
    Filed: October 12, 1990
    Date of Patent: February 18, 1992
    Assignee: Borden, Inc.
    Inventors: David R. Armbruster, S. Raja Iyer, Merlyn C. Pasion
  • Alkaline benzylic ether phenolic resin binders
    Patent number: 5021539
    Abstract: Modified benzylic ether resole resins and process for their preparation. The resins are prepared by treating a phenol with a molar excess of aldehyde in the presence of a divalent metal ion catalyst at a pH below 7 followed by further reaction at a pH above 8 in the presence of an alkaline catalyst. Alkaline solutions of the resins are used as foundry binders in an ester cure process.
    Type: Grant
    Filed: March 24, 1989
    Date of Patent: June 4, 1991
    Assignee: Acme Resin Corporation
    Inventors: David R. Armbruster, Merlyn C. Pasion
  • Alkaline benzylic ether phenolic resin binders
    Patent number: RE34228
    Abstract: Modified benzylic ether resole resins and process for their preparation. The resins are prepared by treating a phenol with a molar excess of aldehyde in the presence of a divalent metal ion catalyst at a pH below 7 followed by further reaction at a pH above 8 in the presence of an alkaline catalyst. Alkaline solutions of the resins are used as foundry binders in an ester cure process.
    Type: Grant
    Filed: March 2, 1992
    Date of Patent: April 20, 1993
    Assignee: Acme Resin Corp.
    Inventors: David R. Armbruster, Merlyn C. Pasion