Patents by Inventor Amrit K. Parhar

Amrit K. Parhar 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: 7473753
    Abstract: Adhesive compositions are described which comprise at least one organic sulfoxide, sulfone or sulfide and at least one ketone, ether, ester, amide or carbonate or a mixture thereof. The adhesive compositions also may contain one or more water insoluble polymers such as ABS, PVC and CPVC. Methods of adhesively bonding or welding a first plastic surface to a second plastic surface using these adhesive compositions also are described.
    Type: Grant
    Filed: April 12, 2005
    Date of Patent: January 6, 2009
    Assignee: Oatey Co.
    Inventors: Amrit K. Parhar, Forest Hampton, III, Charles N. Bush, Fred R. Scholer
  • Patent number: 6887926
    Abstract: A composition, and a method of using the composition, are described which composition comprising: (A) at least one chlorinated polyvinyl chloride or mixture of at least one polyvinyl-chloride and at least one chlorinated polyvinyl-chloride thereof; (B) at least one volatile organic liquid which is a solvent for the polymer of (A); and (C) a stabilizer comprising (i) an organophosphite compound, at least one hindered phenol, at least one of an organotin compound or mixtures thereof, and (ii) at least one metal-containing carbonate salt. The composition and methods of the present invention act to retard the loss of chlorine from the resins of the adhesive compositions and to absorb or otherwise inactive any lost chlorine. The compositions of the invention are useful in a variety of applications including use as adhesives, cements (including solvent cements) glues or pastes for holding together materials by surface attachment, and as sealants which are load-bearing elastic jointing and insulating materials.
    Type: Grant
    Filed: November 15, 2002
    Date of Patent: May 3, 2005
    Assignee: Oatey Co.
    Inventors: Amrit K. Parhar, Charles N. Bush
  • Patent number: 6752309
    Abstract: The present invention relates to water soluble fluxes which comprise at least one wax carrier, at least one surfactant and at least one activator. The present water soluble fluxes are easily applicable with a brush. They have excellent pull through of solder in the joint. The water soluble flux avoids turning copper green and does not burst into flame on heating with a torch.
    Type: Grant
    Filed: July 22, 1999
    Date of Patent: June 22, 2004
    Assignee: Oatey Co.
    Inventor: Amrit K. Parhar