Patents by Inventor Robert Plan

Robert Plan 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 the preparation of purified albumin and albumin obtained by said process
    Patent number: 4169829
    Abstract: Purified albumin is prepared from frozen placenta, placental blood or other hemolyzed blood by the steps of eliminating hemoglobin, eliminating enzymes and eliminating group substances.
    Type: Grant
    Filed: September 30, 1977
    Date of Patent: October 2, 1979
    Assignee: Institut Merieux
    Inventors: Robert Plan, Jacques Liautaud, Marie-France Makula, Paule Gattel, Jean Pla, Andre Debrus
  • Protein product, a process for preparation, and application of said product
    Patent number: 4137222
    Abstract: A gamma globulin-rich fraction from conventional ethanol fractionation of whole placenta is treated(i) with 17% ethanol at pH 5.1 (itself a conventional step in the fractionation)(ii) the precipitate is diluted with water and dialysed to remove alcohol, then LEDA (2-ethoxy-6, 9-diaminoacridine lactate) is added and the precipitate preferably at pH 7.7 .+-. 0.5 discarded(iii) ammonium sulphate at approximately semi-saturation is added and the precipitate collected.This precipitate contains a proteolytic enzyme (plasmin), assaged by caseinolysis and useful for removal of anti-complement from gamma globulin preparations.
    Type: Grant
    Filed: April 11, 1975
    Date of Patent: January 30, 1979
    Assignee: Institut Merieux
    Inventors: Marie-France Makula, Robert Plan