Patents by Inventor Frieder Hohwiller

Frieder Hohwiller 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).

  • Method for producing expandable styrene polymers containing graphite particles
    Patent number: 6130265
    Abstract: In a process for preparing expandable styrene polymers containing graphite particles, styrene is polymerized in aqueous suspension in the presence of graphite particles.
    Type: Grant
    Filed: November 15, 1999
    Date of Patent: October 10, 2000
    Assignee: BASF Aktiengesellschaft
    Inventors: Guiscard Glueck, Klaus Hahn, Karl-Heinz Batscheider, Dieter Naegele, Knut Kaempfer, Wolfram Husemann, Frieder Hohwiller
  • Composite foams of low thermal conductivity
    Patent number: 5137927
    Abstract: A composite foam of low thermal conductivity comprisesa) 20-80% by volume of silica aerogel particles having a mean diameter of from 0.1 to 20 mm and a density of from 0.08 to 0.40 g/cm.sup.3,b) 20-80% by volume of a styrene polymer foam which surrounds the particles of component a) and binds them to one another and has a density of from 0.01 to 0.15 g/cm.sup.3, and, if desired,c) conventional additives in effective amounts.
    Type: Grant
    Filed: January 24, 1992
    Date of Patent: August 11, 1992
    Assignee: BASF Aktiengesellschaft
    Inventors: Bernardo Wolff, Frieder Hohwiller, Guenther Seybold
  • Composite foams of low thermal conductivity
    Patent number: 5124364
    Abstract: A composite foam of low thermal conductivity comprisesa) 20-80% by volume of silica aerogel particles having a mean diameter of from 0.1 to 20 mm and a density of from 0.08 to 0.40 g/cm.sup.3,b) 20-80% by volume of styrene polymer foam which surrounds the particles of component a) and binds them to one another and has a density of from 0.01 to 0.15 g/cm.sup.3, and, if desired,c) conventional additives in effective amounts.
    Type: Grant
    Filed: December 2, 1991
    Date of Patent: June 23, 1992
    Assignee: BASF Aktiengesellschaft
    Inventors: Bernardo Wolff, Frieder Hohwiller, Guenther Seybold
  • Process for the manufacture of a dry mixture for insulating stucco or plaster
    Patent number: 4245054
    Abstract: A process for the manufacture of a thermally insulating light stucco or plaster mixture which consists of expanded polystyrene particles coated with an aqueous solution of methyl cellulose in addition to cement, wall binder and dispersion powders.
    Type: Grant
    Filed: December 12, 1979
    Date of Patent: January 13, 1981
    Assignee: BASF Aktiengesellschaft
    Inventor: Frieder Hohwiller