Patents by Inventor Ahmad M. Shihab

Ahmad M. Shihab 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).

  • Drop in refrigerant blend for mineral oil based systems
    Patent number: 9109149
    Abstract: The present disclosure relates to refrigerants generally, and more specifically to non-flammable, non-ozone depleting mixtures of refrigerants that may be substituted for (HCFC R-22, R-407C, R-417A, R-502, R-402A, R-402B, R-404A, R-408A &R-507A) and usable in mineral oil systems. Among the most preferred embodiments of the present invention(s) are mixtures that are substitutes for these refrigerants, comprising about 35 to 65 weight percent R-125, and about 20 to 55 weight percent R-134a, and about 5 to 25 weight percent of R-143a and about 1 to 5 weight percent hydro component of (R-600 OR R-601) or combination, and about 2-10 weight percent of R-227ea the weight percentages of the components being weight percentages of the overall mixture.
    Type: Grant
    Filed: February 3, 2014
    Date of Patent: August 18, 2015
    Inventor: Ahmad M. Shihab
  • Drop in refrigerant blend for mineral oil based systems
    Patent number: 8652348
    Abstract: The present disclosure relates to refrigerants generally, and more specifically to nonflammable, non-ozone depleting mixtures of refrigerants that may be substituted for (HCFC R-22, R-407C, R-417A, R-502, R-402A, R-402B, R-404A, R-408A &R-507A) and usable in mineral oil systems. Among the most preferred embodiments of the present invention(s) are mixtures that are substitutes for these refrigerants, comprising about 35 to 65 weight percent R-125, and about 20 to 55 weight percent R-134a, and about 5 to 25 weight percent of R-143a and about 1 to 5 weight percent hydro component of (R-600 OR R-601) or combination, and about 2-10 weight percent of R-227ea the weight percentages of the components being weight percentages of the overall mixture.
    Type: Grant
    Filed: April 11, 2013
    Date of Patent: February 18, 2014
    Inventor: Ahmad M. Shihab