Patents by Inventor Nobuaki Tsuda
Nobuaki Tsuda 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).
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Patent number: 4518497Abstract: A blood-treating system in which apparatus for the purification of blood by purifying the blood plasma. The system includes as principal elements, an apparatus for separating blood plasma by way of a membrane, an apparatus for purifying blood plasma and an apparatus for mixing blood with blood plasma to be placed between a blood-introducing portion and a purified blood-withdrawing portion of the system. This system can remove useless substances from blood with a high efficiency without damaging and reducing blood cell components or any fear of mixing of the fine powder in the purifying agent.Type: GrantFiled: May 15, 1980Date of Patent: May 21, 1985Assignee: Asahi Kasei Kogyo Kabushiki KaishaInventors: Nobuaki Tsuda, Naoya Kominami, Kenji Inagaki, Tamotsu Imamiya
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Patent number: 4416777Abstract: Leukocytes are separated from a leukocyte-containing suspension by bringing the leukocyte-containing suspension into contact with a leukocyte-separating material, whereby a substantial part of the leukocytes are entrapped in the leukocyte-separating material, and then, collecting the entrapped leukocytes. The leukocyte-separating material used comprises a fibrous material having a surface layer composed of a substance which is capable of being dissolved in water by degrees. Lymphocytes can also be separated in a manner similar to that mentioned above, from a lymphocyte-containing suspension having reduced contents of granulocytes and monocytes.Type: GrantFiled: October 3, 1980Date of Patent: November 22, 1983Assignee: Asahi Kasei Kogyo Kabushiki KaishaInventors: Toru Kuroda, Yoshinori Takenaka, Nobuaki Tsuda
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Patent number: 4344560Abstract: A container for the continuous centrifugal separation of platelets component in blood, having a first and a second closed chambers adaptable to be rotated around a rotation axis. Whole blood is continuously introduced into the first chamber. Platelet-rich plasma being obtained as supernatant in the first chamber being discharged through a first outlet port opened at a relatively short distance from the rotation axis and being then introduced into the second chamber. Precipitation in the first chamber being discharged through a second outlet port opened at a relatively long distance from the rotation axis. The consistency of the blood in the first chamber being monitored at a predetermined position which differs from the opened position of the first outlet port and being located between the opened positions of the first and second outlet ports with respect to the distance from the rotation axis.Type: GrantFiled: October 20, 1980Date of Patent: August 17, 1982Assignee: Asahi Kasei Kogyo Kabushiki KaishaInventors: Norio Iriguchi, Hiroshi Unno, Nobuaki Tsuda
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Patent number: 4330410Abstract: Leukocytes are advantageously separated from blood or other leukocyte-containing suspensions by causing the leukocyte-containing suspensions to flow through a filter unit comprising a container provided with inlet and outlet conduit means and with a mass of fibers packed therein. The mass of fibers is characterized as possessing a bulk density of from 0.02 to 0.40 gram/cubic centimeter, and each of the fibers is characterized as having an average diameter of from 3 to 10 microns. The fibers to be used are selected from synthetic fibers, semi-synthetic fibers, regenerated fibers and natural proteinaceous fibers.Type: GrantFiled: July 21, 1980Date of Patent: May 18, 1982Assignee: Asahi Kasei Kogyo Kabushiki KaishaInventors: Yoshinori Takenaka, Nobuaki Tsuda, Toru Kuroda
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Patent number: 4246107Abstract: Lymphocytes are advantageously separated from blood or other lymphocyte-containing suspensions by a method wherein the lymphocyte-containing suspension is flowed through a second filter having a mass of fibers exhibiting an average fiber diameter of greater than 10 microns but not greater than 60 microns, thereby to entrap a substantial part of granulocytes and monocytes in the mass of fibers and to obtain a granulocyte-poor and monocyte-poor lymphocyte-containing suspension; and then, the obtained suspension is flowed through a first filter having a mass of fibers exhibiting a bulk density of 0.04 to 0.40 g/cm.sup.3 and an average fiber diameter of 5 to 20 microns, said average fiber diameter being less than that of the second filter, thereby to entrap a substantial part of lymphocytes in the mass of fibers; and finally, the lymphocytes entrapped in the mass of fibers of the first filter is collected.Type: GrantFiled: March 1, 1979Date of Patent: January 20, 1981Assignee: Asahi Kasei Kogyo Kabushiki KaishaInventors: Yoshinori Takenaka, Nobuaki Tsuda, Toru Kuroda
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Patent number: 4243532Abstract: A blood-treating system in which apparatus for the purification of blood by purifying blood plasma, is provided. The system includes as principal elements, an apparatus for separating blood plasma by way of a membrane, an apparatus for purifying blood plasma and an apparatus for mixing blood with blood plasma to be placed between a blood-introducing portion and a purified blood-withdrawing portion of the system. This system can remove useless substances from blood with a high efficiency without damaging and reducing blood cell components or any fear of mixing of the fine powder in the purifying agent.Type: GrantFiled: December 13, 1978Date of Patent: January 6, 1981Assignee: Asahi Kasei Kogyo Kabushiki KaishaInventors: Nobuaki Tsuda, Naoya Kominami, Kenji Inagaki, Tamotsu Imamiya
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Patent number: 4083786Abstract: An apparatus for treating ascites which is safe and superior in performance and does not cause hemolysis, by removing harmful bacteria or cancer cells contained in ascites, by filtration, concentrating useful proteins, etc. contained therein and returning the resulting concentrate to living body is provided.Said apparatus comprises an ascites-transporting means, a hemolysis-preventive means connected to said ascites-transporting means, a filter for removing bacteria and cancer cells, containing at least one membrane for filtering the ascites which has passed said hemolysis-preventive means, and a concentrating vessel containing at least one membrane for concentrating the ascites thus filtered.Type: GrantFiled: March 10, 1976Date of Patent: April 11, 1978Assignee: Asahi Kasei Kogyo Kabushiki KaishaInventors: Nobuaki Tsuda, Naoya Kominami, Kenji Inagaki, Tamotsu Imamiya
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Patent number: 4025436Abstract: A liquid treatment apparatus which can perform dialysis at a very high efficiency and which is suitable for dialysis of human blood is provided. The apparatus comprises a bundle of a vast plurality of semi-permeable hollow fibers substantially equal in length, which is gathered and bonded only at both end portions thereof. An inside liquid is permitted to flow the interior of the individual hollow fibers. This bundle of hollow fibers is loosely suspended in a vessel having a substantially U-shaped passage for an outside liquid, and the two gathered and bonded portions of the fiber bundle are connected to the vessel at two spaced-apart openings formed on the top face of the vessel. A dialyzate flowing outside the hollow fibers is introduced from an introduction opening formed in the bottom face of the vessel.Type: GrantFiled: September 5, 1975Date of Patent: May 24, 1977Assignee: Asahi Kasei Kogyo Kabushiki KaishaInventors: Nobuaki Tsuda, Kenji Inagaki, Tamotu Imamiya, Kunio Ohno, Yoshiyuki Mizoguchi