Patents by Inventor David Dumolo

David Dumolo 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).

  • Patent number: 4320037
    Abstract: A foundry mold or core is prepared by mixing with a foundry aggregate a polyisocyanate, a polymeric addition product of a phenol and a further material comprising aromatic hydroxyl groups, forming the mixture to the required shape and causing or permitting the polyisocyanate to react with both the addition product and the further material to bind the aggregate. The addition product may be prepared by reacting an unsaturated hydrocarbon with a phenol. The hydrocarbon may be comprised by a mixture of terpenes. The further hydroxy material may be a bisphenol or phenolic resin.
    Type: Grant
    Filed: August 7, 1979
    Date of Patent: March 16, 1982
    Assignee: Fordath Limited
    Inventor: David Dumolo
  • Patent number: 4224201
    Abstract: In a foundry binder comprising a polyisocyanate and a polyhydroxy composition, the polyisocyanate is modified by reaction with a drying oil. The composition is useful in a "cold box" process.
    Type: Grant
    Filed: December 19, 1978
    Date of Patent: September 23, 1980
    Assignee: Fordath Limited
    Inventor: David Dumolo
  • Patent number: 4209428
    Abstract: A foundry composition for use in forming foundry moulds or cores comprises an aggregate mixed with a binder which includes a polyisocyanate, a polyfunctional phenol and an aliphatic polyol with the weight of the phenol exceeding that of the polyol. The composition may be used in a "cold-box" process.
    Type: Grant
    Filed: September 26, 1977
    Date of Patent: June 24, 1980
    Assignee: Fordath Limited
    Inventor: David Dumolo