Patents by Inventor Wilhelm Knackstedt

Wilhelm Knackstedt 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 production of composite safety glass
    Patent number: 4952460
    Abstract: An improvement in a method for manufacturing a composite safety glass wherein one or more silicate glass panes is bonded to a plasticized synthetic resin film at an elevated temperature, the improvement residing in employing as the plasticized synthetic resin film a soft film of a polymer of ethylene and/or propylene and effecting the bonding under pressure at a temperature of at least 120.degree. C. and up to 200.degree. C.
    Type: Grant
    Filed: June 16, 1989
    Date of Patent: August 28, 1990
    Assignee: Dynamit Nobel AG
    Inventors: Rolf Beckmann, Wilhelm Knackstedt
  • Plasticizer-containing films of partially acetalized polyvinyl alcohols
    Patent number: 4361625
    Abstract: A plasticizer-containing film of a partially acetalized polyvinyl alcohol resin contains as the plasticizer a mixture of an ester of an organic cyclic acid and/or a conventional acetal plasticizer for said resin, and an ester of an oxygen acid of phosphorus.
    Type: Grant
    Filed: May 10, 1979
    Date of Patent: November 30, 1982
    Assignee: Dynamit Nobel Aktiengesellschaft
    Inventors: Rolf Beckmann, Wilhelm Knackstedt
  • Process of the production of composite safety glass
    Patent number: 4303739
    Abstract: An improvement in a method for manufacturing a composite safety glass wherein one or more silicate glass panes is bonded to a plasticized synthetic resin film at an elevated temperature, the improvement residing in employing as the plasticized synthetic resin film a soft film of a polymer of ethylene and/or propylene and effecting the bonding under pressure at a temperature of at least 120.degree. C. and up to 200.degree. C.
    Type: Grant
    Filed: February 22, 1979
    Date of Patent: December 1, 1981
    Assignee: Dynamit Nobel AG
    Inventors: Rolf Beckmann, Wilhelm Knackstedt
  • Method of manufacturing laminated safety glass
    Patent number: 4277538
    Abstract: A laminated safety glass comprising a layer of a silicate glass, to which is bonded a layer of a plasticized plastic sheet containing polyvinyl chloride, said laminate containing therein an organofunctional silane and a process for preparing such laminated safety glass by unilateral or bilateral bonding of one or more silicate glass sheets with a plasticized polyvinyl chloride plastic film at an elevated temperature wherein the bonding is effected with the aid of a silicon-organo-functional silane and the bonding is effected at 120.degree.-200.degree. C.
    Type: Grant
    Filed: January 24, 1980
    Date of Patent: July 7, 1981
    Assignee: Dynamit Nobel Aktiengesellschaft
    Inventors: Rolf Beckmann, Wilhelm Knackstedt
  • Process for the production of modified, partially acetalized polyvinyl alcohol films
    Patent number: 4144376
    Abstract: A process for adjusting the adhesive force or strength of a plasticizer-containing, partially acetalized polyvinyl alcohol film to inorganic glasses to the pummel adhesion values required for a given application involves the addition of at least one silane while the resin is processed into a film by conventional methods in predetermined amounts. The suitable silanes include:(a) a silicon-functional silane or a mixture of various silicon-functional silanes for reducing the adhesive force; or(b) a silicon-organofunctional silane or a mixture of silicon-organofunctional silanes for increasing the adhesive force; or(c) a mixture of at least one silicon-functional silane with at least one silicon-organofunctional silane.
    Type: Grant
    Filed: March 14, 1977
    Date of Patent: March 13, 1979
    Assignee: Dynamit Nobel Aktiengesellschaft
    Inventors: Rolf Beckmann, Wilhelm Knackstedt