Patents by Inventor Wolfgang Griehl

Wolfgang Griehl 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 ternary polyamide filaments
    Patent number: 4277433
    Abstract: Filaments of a copolyamide which is derived from at least three polyamide-forming, unbranched, saturated, randomly distributed monomer components, having an average amide group frequency of one --CONH-- to 6.4 to 7.4 --CH.sub.2 -- and in which each of said monomer components is present in an amount of 10 to 60 mol %, based on the number of moles of all said components, and the sum of the mole % amounts of all monomer components is 100, said copolyamide having a melting point of less than 155.degree. C. A method of making such filaments is also disclosed.
    Type: Grant
    Filed: February 1, 1980
    Date of Patent: July 7, 1981
    Assignee: Inventa AG fur Forschung und Patentverwertung
    Inventors: Eduard Schmid, Wolfgang Griehl
  • Method for the manufacture of glass clear transparent polyamide
    Patent number: 4268661
    Abstract: Polyamides are described which are useful for injection molding and which are produced by the polycondensation of (a) a diaminodicyclohexane or a diaminodicyclohexylalkane, (b) a polyamide-forming aromatic dicarboxylic acid, and (c) an aliphatic dicarboxylic acid-diamine mixture or salt thereof.
    Type: Grant
    Filed: February 19, 1980
    Date of Patent: May 19, 1981
    Assignee: Inventa AG fur Forschung und Patentverwertung, Zurich
    Inventors: Eduard Schmid, Wolfgang Griehl
  • Injection moldable glass clear transparent polyamide
    Patent number: 4232145
    Abstract: Polyamides are described which are useful for injection molding and which are produced by the polycondensation of (a) a diaminodicyclohexane or a diaminodicyclohexylalkane, (b) a polyamide-forming aromatic dicarboxylic acid of more than 9 carbon atoms, and (c) an .omega.-amino-acid, a lactam of more than 9 carbon atoms, or an aliphatic dicarboxylic acid-diamine mixture or salt thereof.
    Type: Grant
    Filed: December 18, 1978
    Date of Patent: November 4, 1980
    Assignee: Inventa AG fur Forschung und Patentverwertung, Zurich
    Inventors: Eduard Schmid, Wolfgang Griehl
  • Ternary polyamide filaments
    Patent number: 4225699
    Abstract: Filaments of a copolyamide which is derived from at least three polyamide-forming, unbranched, saturated, randomly distributed monomer components, having an average amide group frequency of one --CONH-- to 6.4 to 7.4 --CH.sub.2 -- and in which each of said monomer components is present in an amount of 10 to 60 mol %, based on the number of moles of all said components, and the sum of the mole % amounts of all monomer components is 100, said copolyamide having a melting point of less than 155.degree. C. A method of making such filaments is also disclosed.
    Type: Grant
    Filed: January 6, 1978
    Date of Patent: September 30, 1980
    Assignee: Inventa AG fur Forschung und Patentverwertung, Zurich
    Inventors: Eduard Schmid, Wolfgang Griehl
  • Fiber-reinforced cement-like material
    Patent number: 4199366
    Abstract: The present invention provides for a novel fiber-reinforced cement-like material which is characterized by having short polyvinyl alcohol fibers in an amount of at least 2 volume % based on the total volume of said material. These fibers have an elongation at break of between about 4 and 8% and a modulus of more than 130 g/dtex. A process for the preparation of said material is also disclosed.
    Type: Grant
    Filed: November 20, 1978
    Date of Patent: April 22, 1980
    Assignee: Inventa AG fur Forschung und Patentverwertung
    Inventors: Peter Schaefer, Marcel Capaul, Wolfgang Griehl, Peter Meier
  • Process for producing hydrolysis-stable shaped structures of polyester
    Patent number: 4144285
    Abstract: A process is disclosed for treating polyester material with at least one N-glycidylimide compound which results in reducing the terminal carboxyl group content of the polyester material.
    Type: Grant
    Filed: June 6, 1977
    Date of Patent: March 13, 1979
    Assignee: Inventa AG Fur Forschung und Patent-verwertung, Zurich
    Inventors: Max Maschek, Marcel Capaul, Wolfgang Griehl