Patents by Inventor Mehdi Sadat-Shojai

Mehdi Sadat-Shojai 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).

  • Method for production of biocompatible nanoparticles containing dental adhesive
    Patent number: 8357732
    Abstract: A method of synthesizing hydroxyapatite nanorods, having high purity, high crystallinity and high aspect ratio is disclosed here. In one embodiment, high crystalline hydroxyapatite nanorods with relatively stoichiometric structure are prepared via hydrothermal method at 200° C. and under moderate acidic conditions. The synthesized hydroxyapatite nanorods have a diameter of 30-95 nm, a length of 850-1400 nm with an average aspect ratio of 24, degree of crystallinity of 73% and stoichiometry ratio of 1.69. Further it discloses the use of HAp in dental adhesive. The dental adhesive comprising synthesized HAp shows improved diametral tensile strength and high microshear bond strength. Energy dispersive X-ray mapping confirmed the uniform distribution of nanorods in the adhesive matrix. The synthesized hydroxyapatite nanorods have high colloidal stability in the dental adhesive solution.
    Type: Grant
    Filed: March 14, 2010
    Date of Patent: January 22, 2013
    Inventors: Mehdi Sadat-Shojai, Mohammad Atai, Azizollah Nodehi
  • METHOD FOR PRODUCTION OF BIOCOMPATIBLE NANOPARTICLES CONTAINING DENTAL ADHESIVE
    Publication number: 20100166680
    Abstract: A method of synthesizing hydroxyapatite nanorods, having high purity, high crystallinity and high aspect ratio is disclosed here. In one embodiment, high crystalline hydroxyapatite nanorods with relatively stoichiometric structure are prepared via hydrothermal method at 200° C. and under moderate acidic conditions. The synthesized hydroxyapatite nanorods have a diameter of 30-95 nm, a length of 850-1400 nm with an average aspect ratio of 24, degree of crystallinity of 73% and stoichiometry ratio of 1.69. Further it discloses the use of HAp in dental adhesive. The dental adhesive comprising synthesized HAp shows improved diametral tensile strength and high microshear bond strength. Energy dispersive X-ray mapping confirmed the uniform distribution of nanorods in the adhesive matrix. The synthesized hydroxyapatite nanorods have high colloidal stability in the dental adhesive solution.
    Type: Application
    Filed: March 14, 2010
    Publication date: July 1, 2010
    Applicant: IRAN POLYMER AND PETROCHEMICAL INSTITUTE
    Inventors: Mehdi Sadat-Shojai, Mohammad Atai, Azizollah Nodehi