Patents by Inventor Daniel T. Schaefer

Daniel T. Schaefer 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).

  • Patent number: 5474741
    Abstract: A method for reducing X-Y shrinkage during firing of ceramic bodies in which a flexible constraining layer, which becomes porous during firing, is applied to the ceramic body such that the flexible constraining layer conforms closely to the surface of the unfired ceramic body as the assemblage is fired.
    Type: Grant
    Filed: December 21, 1994
    Date of Patent: December 12, 1995
    Assignee: E. I. Du Pont de Nemours and Company
    Inventors: Kurt R. Mikeska, Daniel T. Schaefer
  • Patent number: 5387474
    Abstract: A composite comprising an unfired ceramic body comprising an admixture of finely divided particles of ceramic solids and sinterable inorganic binder dispersed in a volatilizable solid polymeric binder having affixed and closely conformed to a surface of said body a flexible constraining release layer comprising finely divided particles of non-metallic inorganic solids dispersed in a volatilizable solid polymeric binder, the sinterable inorganic binder of the ceramic body being such that Penetration of said binder into said constraining release layer during subsequent firing is no more than 50 .mu.m and said constraining release layer being affixed and closely conforming such that upon firing X-Y shrinkage of the ceramic body is reduced. Also, a method for making the composite. The flexible, constraining, release layer substantially reduces and controls green ceramic body shrinkage in the x- and y-directions during firing.
    Type: Grant
    Filed: August 6, 1993
    Date of Patent: February 7, 1995
    Assignee: E. I. Du Pont de Nemours and Company
    Inventors: Kurt R. Mikeska, Daniel T. Schaefer
  • Patent number: 5254191
    Abstract: A method for reducing X-Y shrinkage during firing of ceramic bodies in which a flexible constraining layer, which becomes porous during firing, is applied to the ceramic body such that the flexible constraining layer conforms closely to the surface of the unfired ceramic body as the assemblage is fired.
    Type: Grant
    Filed: October 4, 1990
    Date of Patent: October 19, 1993
    Assignee: E. I. Du Pont de Nemours and Company
    Inventors: Kurt R. Mikeska, Daniel T. Schaefer
  • Patent number: 5085720
    Abstract: A method for reducing X-Y shrinkage during firing of green ceramic bodies in which a release layer, which becomes porous during firing, is placed upon the ceramic body and the assemblage is fired while maintaining pressure on the assemblage normal to the body surface.
    Type: Grant
    Filed: April 29, 1991
    Date of Patent: February 4, 1992
    Assignee: E. I. Du Pont de Nemours and Company
    Inventors: Kurt R. Mikeska, Daniel T. Schaefer, Richard H. Jensen