Patents by Inventor Ivan Petkov

Ivan Petkov 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).

  • Patent number: 7585350
    Abstract: A process for producing a ferronickel product from a mixed nickel iron hydroxide product, said process including the steps of: providing a mixed nickel iron hydroxide product; pelletising the mixed nickel iron hydroxide product to produce nickel iron hydroxide pellets; calcining the nickel iron hydroxide pellets to produce mixed nickel iron oxide pellets; and reducing the nickel iron oxide pellets with one or more reducing gases at high temperatures to produce ferronickel pellets.
    Type: Grant
    Filed: August 16, 2007
    Date of Patent: September 8, 2009
    Inventors: Alexey Duarte, Houyuan Liu, Ivan Petkov Ratchev
  • Publication number: 20050127056
    Abstract: The present invention provides a bag, box or other compartmentalized storage and/or transportable system for heating and/or drying articles in the system. The bag includes at least one heating element that transmits sufficient heat to dry and heat articles, such as boots, shoes, clothing, equipment and the like, from the outside inward to completely dry the articles. The heating elements are connected to a power source, such as electrical outlet, vehicle DC power adaptor or battery source.
    Type: Application
    Filed: May 15, 2004
    Publication date: June 16, 2005
    Inventors: Ivan Petkov, Sven Coomer
  • Patent number: 5876066
    Abstract: A carving ski pole for assisting a skier/snowboarder in balancing on and carving through snow. The carving ski pole comprises a first shaft member detachably coupled to a second shaft member. A first arcuate gliding member is coupled to the free end of the first shaft member and a second arcuate gliding member is coupled to the free end of the second shaft member. The first and second shaft members each also have extendible arms for lengthening the overall length of the carving ski pole.
    Type: Grant
    Filed: December 3, 1996
    Date of Patent: March 2, 1999
    Inventor: Ivan Petkov
  • Patent number: 5405161
    Abstract: The present invention relates to ski having a tip portion, a tail portion and a waist portion between the tip portion and the tail portion. In accordance with the present invention, the ski has a wider tip and tail than do conventional skis. This widening of tip and tail are coupled with an exaggerated "side cut" or curvature of at least in the inside edge of the ski. A ski according the present invention has an exaggerated tip between 1.5 to 2.25 times the narrowest point of the waist and an exaggerated tail with a ratio of 1.05 to 2.14 times the narrowest point of the waist.
    Type: Grant
    Filed: February 4, 1994
    Date of Patent: April 11, 1995
    Assignee: Dennis Young
    Inventor: Ivan Petkov
  • Patent number: 4337078
    Abstract: A substrate for the cultivation of plants in greenhouses or outdoors comprises klinoptylolite zeolite, vermiculite and peat in specified particle size ranges and relationships, with enhanced nitrogen and phosphorus content, to provide a highly versatile and surprisingly effective active growing medium.
    Type: Grant
    Filed: November 17, 1980
    Date of Patent: June 29, 1982
    Assignee: N P S K "Mineralagro"
    Inventors: Georgi S. Petrov, Ivan A. Petkov, Hristo I. Etropolski, Dimiter N. Dimitrov, Nikolay N. Popov, Atanas I. Uzunov