Patents by Inventor Frederick H. Lucas

Frederick H. Lucas 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).

  • Mill box for materials grinder
    Patent number: 7441719
    Abstract: A grinder having a grinding structure and a sizing screen is disclosed herein. A top cover covers the grinding structure. The sizing screen can be removed from the grinder by opening the cover, and lifting the sizing screen through the opening left by the cover.
    Type: Grant
    Filed: October 4, 2005
    Date of Patent: October 28, 2008
    Assignee: Vermeer Manufacturing Company
    Inventors: Gary Verhoef, Frederick H. Lucas, Duane A. Harthoorn
  • Mill box for materials grinder
    Patent number: 6978955
    Abstract: A grinder having a grinding structure and a sizing screen is disclosed herein. A top cover covers the grinding structure. The sizing screen can be removed from the grinder by opening the cover, and lifting the sizing screen through the opening left by the cover.
    Type: Grant
    Filed: December 17, 2004
    Date of Patent: December 27, 2005
    Assignee: Vermeer Manufacturing Company
    Inventors: Gary Verhoef, Frederick H. Lucas, Duane A. Harthoorn
  • Mill box for materials grinder
    Patent number: 6843435
    Abstract: A grinder having a grinding structure and a sizing screen is disclosed herein. A top cover covers the grinding structure. The sizing screen can be removed from the grinder by opening the cover, and lifting the sizing screen through the opening left by the cover.
    Type: Grant
    Filed: November 18, 2002
    Date of Patent: January 18, 2005
    Assignee: Vermeer Manufacturing Company
    Inventors: Gary Verhoef, Frederick H. Lucas, Duane A. Harthoorn
  • MILL BOX FOR MATERIALS GRINDER
    Publication number: 20040251346
    Abstract: A grinder having a grinding structure and a sizing screen is disclosed herein. A top cover covers the grinding structure. The sizing screen can be removed from the grinder by opening the cover, and lifting the sizing screen through the opening left by the cover.
    Type: Application
    Filed: November 18, 2002
    Publication date: December 16, 2004
    Inventors: Gary Verhoef, Frederick H. Lucas, Duane A. Harthoorn