Patents by Inventor Simon Pierce Burns

Simon Pierce Burns 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).

  • Process for reducing the acidity of organic polymeric isocyanates
    Patent number: 4118286
    Abstract: In a process for purifying and reducing the acidity of a polymethylene polyphenylpolyisocyanate mixture wherein the mixture is subjected to a distillation step, such as by passing a flowing stream of a crude polymethylene polyphenylpolyisocyanate mixture through a distillation column which has a reboiler means consisting of a thin film evaporator apparatus mounted therewith for rapidly heating the stream to about 190.degree. C. to about 250.degree. C. whereby the solvent and impurities are taken overhead, and then allowing the distillation residue of polymethylene polyphenylpolyisocyanate to cool, an improvement is disclosed which comprises maintaining the distillation residue of the polymethylene polyphenylpolyisocyanate at a temperature of about 190.degree. C. to about 250.degree. C.
    Type: Grant
    Filed: September 25, 1974
    Date of Patent: October 3, 1978
    Assignee: Texaco Development Corp.
    Inventors: Simon Pierce Burns, John Monte Walton