Patents by Inventor Peter Hulser

Peter Hulser 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).

  • Chromium(VI)-free conversion layer and method for producing it
    Patent number: 7314671
    Abstract: A chromium(VI)-free, chromium(III)-containing and substantially coherent conversion layer on zinc or zinc alloys presenting, even in the absence of further components such as silicate, cerium, aluminum and borate, a corrosion protection of approx. 100 to 1000 h in the salt spray test according to DIN 50021 SS or ASTM B 117-73 until first attack according to DIN 50961 Chapter 10; being clear, transparent and substantially colorless and presenting multi-colored iridescence; having a layer thickness of approx. 100 nm to 1000 nm; and being hard, adhering well and being resistant to wiping.
    Type: Grant
    Filed: July 19, 2004
    Date of Patent: January 1, 2008
    Assignee: SurTec International GmbH
    Inventors: Patricia Preikschat, Rolf Jansen, Peter Hulser
  • Chromium (VI)-free conversion layer and method for producing it
    Patent number: 6946201
    Abstract: A chromium(VI)-free, chromium(III)-containing and substantially coherent conversion layer on zinc or zinc alloys presenting, even in the absence of further components such as silicate, cerium, aluminum and borate, a corrosion protection of approx. 100 to 1000 h in the salt spray test according to DIN 50021 SS or ASTM B 117-73 until first attack according to DIN 50961 Chapter 10; being clear, transparent and substantially colorless and presenting multi colored iridescence; having a layer thickness of approx. 100 nm to 1000 nm; and being hard, adhering well and being resistant to wiping.
    Type: Grant
    Filed: July 13, 2001
    Date of Patent: September 20, 2005
    Assignee: SurTec International GmbH
    Inventors: Patricia Preikschat, Rolf Jansen, Peter Hulser
  • Chromium (VI)-free conversion layer and method for producing it
    Publication number: 20030207133
    Abstract: A chromium(VI)-free, chromium(III)-containing and substantially coherent conversion layer on zinc or zinc alloys presenting, even in the absence of further components such as silicate, cerium, aluminum and borate, a corrosion protection of approx. 100 to 1000 h in the salt spray test according to DIN 50021 SS or ASTM B 117-73 until first attack according to DIN 50961 Chapter 10; being clear, transparent and substantially colorless and presenting multi-colored iridescence; having a layer thickness of approx. 100 nm to 1000 nm; and being hard, adhering well and being resistant to wiping.
    Type: Application
    Filed: July 13, 2001
    Publication date: November 6, 2003
    Inventors: Patricia Preikschat, Rolf Jansen, Peter Hulser
  • Chromate-free conversion layer and process for producing the same
    Patent number: 6287704
    Abstract: A chromium(VI)-free, chromium(III)-containing and substantially coherent conversion layer on zinc or zinc alloys presenting, even in the absence of further components such as silicate, cerium, aluminum and borate, a corrosion protection of approx. 100 to 1000 h in the salt spray test according to DIN 50021 SS or ASTM B 117-73 until first attack according to DIN 50961 Chapter 10; being clear, transparent and substantially colorless and presenting multi-colored iridescence; having a layer thickness of approx. 100 nm to 1000 nm; and being hard, adhering well and being resistant to wiping.
    Type: Grant
    Filed: March 29, 1999
    Date of Patent: September 11, 2001
    Assignee: Surtec Produkte und System fur die Oberflachenbehandlung GmbH
    Inventors: Patricia Preikschat, Rolf Jansen, Peter Hulser