Patents by Inventor Mark P. de Grandpre

Mark P. de Grandpre 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).

  • Multi-stage polymer latex cement modifier and process of making
    Patent number: 5328952
    Abstract: Multi-stage polymer process and composition having an alkali-insoluble emulsion polymer and an alkali-soluble polymer are produced by a two-stage sequential emulsion polymerization process. When the multi-stage polymers of this invention are utilized as cement modifiers, improvements in cement mortar physical properties are realized.
    Type: Grant
    Filed: February 14, 1992
    Date of Patent: July 12, 1994
    Assignee: Rohm and Haas Company
    Inventors: John G. Brodnyan, Shang-Jaw Chiou, Mark P. de Grandpre
  • Positive photoresists containing preformed polyglutarimide polymer
    Patent number: 4524121
    Abstract: This invention relates to a positive photoresist system possessing a high degree of thermal stability. The photoresist system contains a preformed polyglutarimide polymer dissolved in a non-reacting solvent. The positive resist is capable of achieving high resolution images by exposure to a wide range of wavelengths and development using an aqueous base developer. The photoresist system is also suitable for use as a planarizing layer in a multiple layer system.
    Type: Grant
    Filed: November 21, 1983
    Date of Patent: June 18, 1985
    Assignee: Rohm and Haas Company
    Inventors: Robert D. Gleim, Mark P. de Grandpre