Patents by Inventor Werner Kiefer

Werner Kiefer 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).

  • Fire resistant windows
    Patent number: 4113904
    Abstract: A window composed of a frame having at least two, parallel disposed, spaced glass panes. At least one of the panes is composed of fire-resistant glass. The fire resistant pane can be a borosilicate or alumino silicate glass having a compressive prestress in the peripheral edge portion thereof, and for which the product of thermal expansion .alpha. and the elastic modulus E is 1-5 kp .times. cm.sup.-2 .times. .degree. C.sup.-1.
    Type: Grant
    Filed: December 3, 1975
    Date of Patent: September 12, 1978
    Assignee: Jenaer Glaswerk Schott & Gen.
    Inventor: Werner Kiefer
  • Fireproof glass windowpanes
    Patent number: 3984252
    Abstract: Fireproof glass, or glass ceramic in a form suitable for use as windowpanes, which will withstand heating in accordance with DIN (German Industrial Norm) 4102 (1970 edition), standard temperature curve I, and having a compressive prestress in the peripheral portion thereof. The glass, or glass ceramic is such that the product of the thermal expansion coefficient, .alpha., and the modulus of elasticity, E, is 1 to 5 kp .times. cm.sup..sup.-2 .times. .degree.C.sup..sup.-1.
    Type: Grant
    Filed: September 13, 1974
    Date of Patent: October 5, 1976
    Assignee: Jenaer Glaswerk Schott & Gen.
    Inventor: Werner Kiefer