Patents by Inventor Christian Bent Lundsager

Christian Bent Lundsager 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).

  • Monolith design
    Patent number: 4054702
    Abstract: Monoliths made by joining ribbed sheet together have a tendency to collapse when the ribs of adjacent layers do not coincide. When the monolith is made by winding embossed sheet around a mandrel there will always be places where ribs do not coincide and which tend to collapse. This deficiency is minimized by using sheet with ribs having un-equal separation. Such sheet is obtained by embossing with a roll designed for this purpose, and the monoliths of this invention have unique features of channel dimensions.
    Type: Grant
    Filed: March 5, 1976
    Date of Patent: October 18, 1977
    Assignee: W. R. Grace & Co.
    Inventors: Christian Bent Lundsager, Edwin M. Glocker
  • Ceramic firing process
    Patent number: 3985846
    Abstract: This invention relates to an improvement in the process of preparing porous ceramic articles which are formed by blending a composition containing a polyolefin, a ceramic filler and a plasticizer; shaping the blend; extracting the plasticizer and firing the article to remove the polyolefin. The improvement comprises soaking the extracted article in a water solution of a surfactant prior to firing which results in a substantial reduction in the number of cracked pieces when firing many pieces simultaneously.
    Type: Grant
    Filed: April 16, 1975
    Date of Patent: October 12, 1976
    Assignee: W. R. Grace & Co.
    Inventors: Christian Bent Lundsager, Robert Matthews Murch
  • Porous ceramic structure
    Patent number: 3963504
    Abstract: A porous ceramic monolithic structure prepared by shaping a ceramic filled polyolefinic material containing a plasticizer, shaping, extracting the plasticizer and treating to remove the polyolefin. The monolithic structure is characterized by uniform pore openings. It has uniform channels of an essentially rectangular cross section, laterally through the length of the monolith, varying in size from 0.025 to 0.20 inches.
    Type: Grant
    Filed: December 24, 1974
    Date of Patent: June 15, 1976
    Assignee: W. R. Grace & Co.
    Inventor: Christian Bent Lundsager