Patents by Inventor Zafir Petrov

Zafir Petrov 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).

  • Installation for the generation of electricity
    Publication number: 20040041401
    Abstract: The autonomous installation for generating electric power is applicable in production of electric current in large amounts according to the installed capacity, without resorting to the use of known traditional sources of energy.
    Type: Application
    Filed: March 20, 2003
    Publication date: March 4, 2004
    Inventors: Konstantin Trenchev, Zafir Petrov
  • Core for deep draw molding a closure cap for bottles and the like
    Patent number: 4099903
    Abstract: A bottle cap is constructed with stepped portions, including a large diameter serrated lower portion, an intermediate diameter threaded portion, and a smaller diameter serrated upper portion. The cap is produced by deep drawing on a mold core having a base portion carrying a pedestal, to which a thread-forming portion is rigidly secured. A large diameter, lower serration-forming portion and a small diameter, upper serration-forming portion are rotatably mounted on the pedestal below and above the thread-forming mold portion, respectively. After the bottle cap is formed the pedestal is rotated, to disengage the completed cap from the mold core.
    Type: Grant
    Filed: April 12, 1977
    Date of Patent: July 11, 1978
    Inventor: Zafir Petrov