Patents by Inventor Yukihiro Oonaka

Yukihiro Oonaka 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).

  • Apparatus for separation of blood components
    Patent number: 5141645
    Abstract: A method for the separation of blood into the components and apparatus thereof, characterized by subjecting the blood to strong centrifugation thereby separating said blood into an upper layer (A) of platelet-deficient blood plasma, an intermediate layer (B) of a mixture of platelets and white blood corpuscles, and a lower layer (C) of a red blood corpuscle concentrate, adjusting the hematocrit value of said red blood corpuscle concentrate of (C) to not more than 80% by diluting said red blood corpuscle concentrate with part of said platelet-deficient blood plasma of (A), and subjecting said mixture of (B) to weak centrifugation thereby separating said mixture into a lower layer of white blood corpuscles and an upper layer of a platelet concentrate, and if desired, subjecting the remaining platelet-deficient blood plasma to the treatments of freezing, thawing, and centrifugation thereby separating said platelet-deficient blood plasma into cryoprecipitate and cryoprecipitate-deficient blood plasma, and anaratu
    Type: Grant
    Filed: June 5, 1991
    Date of Patent: August 25, 1992
    Assignee: Terumo Corporation
    Inventors: Hiroshi Shiraki, Kiyoko Yamamoto, Akiko Kitagawa, Tatsuhiko Kawaoka, Yukihiro Oonaka
  • Method for separation of blood components and apparatus thereof
    Patent number: 5071570
    Abstract: A method for the separation of blood into the components thereof, characterized by subjecting the blood to strong centrifugation thereby separating said blood into an upper layer (A) of platelet-deficient blood plasma an intermediate layer (B) of a mixture of platelets and white blood corpuscles, and a lower layer (C) of a red blood corpuscle concentrate, adjusting the hematocrit value of said red blood corpuscle concentrate of (C) to not more than 80% by diluting said red blood corpuscle concentrate with part of said platelet-deficient blood plasma of (A), and subjecting said mixture of (B) to weak centrifugation thereby separating said mixture into a lower layer of white blood corpuscles and an upper layer of a platelet concentrate, and if desired, subjecting the remaining platelet-deficient blood plasma to the treatments of freezing, thawing, and centrifugation thereby separating said platelet-deficient blood plasma into cryoprecipitate and cryoprecipitate-deficient blood plasma, and apparatus therefor.
    Type: Grant
    Filed: November 19, 1990
    Date of Patent: December 10, 1991
    Assignee: Terumo Corporation
    Inventors: Hiroshi Shiraki, Kiyoko Yamamoto, Akiko Kitagawa, Tatsuhiko Kawaoka, Yukihiro Oonaka