Patents by Inventor Paul H. Lange, Jr.

Paul H. Lange, Jr. 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 making carbohydrazide
    Patent number: 4496761
    Abstract: Disclosed is a process for making carbohydrazide by reacting a di(lower alkyl) carbonate with hydrazine in two-stages with an intermediate step of removing the corresponding lower alkanol formed as a co-product in the first stage. The two reaction stages are carried out at relatively low temperatures (i.e. below about 80.degree. C.).
    Type: Grant
    Filed: August 17, 1982
    Date of Patent: January 29, 1985
    Assignee: Olin Corporation
    Inventor: Paul H. Lange, Jr.
  • Process for reducing radioactive contamination in waste product gypsum
    Patent number: 4146568
    Abstract: A process for reducing the radioactive contamination in waste product gypsum in which waste product gypsum is reacted with a dilute sulfuric acid containing barium sulfate to form an acid slurry at an elevated temperature, the slurry is preferably cooled, the acid component is separated from the solid, and the resulting solid is separated into a fine fraction and a coarse fraction. The fine fraction predominates in barium sulfate and radioactive contamination. The coarse fraction predominates in a purified gypsum product of reduced radioactive contamination.
    Type: Grant
    Filed: August 1, 1977
    Date of Patent: March 27, 1979
    Assignee: Olin Corporation
    Inventor: Paul H. Lange, Jr.