Patents by Inventor Megumi Aoki
Megumi Aoki 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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Publication number: 20220143263Abstract: Provided is a thrombin-carrying hemostatic sheet that is suitable for hemostasis during surgery, in particular, for hemostasis during spine surgery, that is convenient without preparation before use, and that is bioabsorbable and can be embedded in the body as it is. The hemostatic sheet is composed of a gelatin sponge carrying an effective amount of thrombin, wherein (A) the density is 30 to 55 mg/cm3, and (B) the shape maintaining angle in wet conditions is 55 to 120°.Type: ApplicationFiled: March 19, 2020Publication date: May 12, 2022Applicants: Astellas Pharma Inc., National University Corporation Tokyo Medical and Dental UniversityInventors: Makoto OGINO, Keiichi YOSHIHARA, Yasuharu KIMURA, Megumi AOKI, Toshitaka YOSHII, Satoru EGAWA
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Patent number: 6899985Abstract: The present invention relates to a toner for developing an electrostatic latent image comprising a binder resin, a colorant, a first wax, and a second wax whose kind is different from that of the first wax, wherein the toner is prepared by a kneading-grinding method and integrated domains of the first wax and the second wax are dispersed in the binder resin.Type: GrantFiled: July 23, 2002Date of Patent: May 31, 2005Assignee: Minolta Co., Ltd.Inventors: Masahide Inoue, Chikara Tsutsui, Yoshihiro Mikuriya, Yoshitaka Sekiguchi, Takeshi Arai, Megumi Aoki, Masahiro Anno
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Patent number: 6842523Abstract: In an encryption apparatus for encrypting a data body to contain an encrypted data body in transmission data and transmitting the transmission data to a receiver, the transmission data includes sender's key recovery data obtained by encrypting recovery information for recovering a key for decrypting the encrypted data body to allow a key recovery agent registered by a sender to decrypt the recovery information, and receiver's key recovery data obtained by encrypting the recovery information for recovering the key for decrypting the encrypted data body to allow a key recovery agent registered by a receiver to decrypt the recovery information.Type: GrantFiled: November 24, 1999Date of Patent: January 11, 2005Assignee: Kabushiki Kaisha ToshibaInventors: Akito Niwa, Shinichi Kawamura, Megumi Aoki, Toshiaki Saisho, Tatsuya Ishihara, Fumihiko Sano, Satomi Hori
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Patent number: 6777151Abstract: The present invention relates to a negatively chargeable toner, comprising: toner particles prepared by means of a wet granulation method; and external additives externally added to the toner particles, wherein the external additives comprises a first hydrophobic silica having a mean primary particle size of 5 nm to 18 nm, a second hydrophobic silica having a mean primary particle size of 18 nm to 50 nm, which is greater than that of the first hydrophobic silica, and a hydrophobic titanium oxide having a mean primary particle size of 10 nm to 40 nm, and a full color image-forming method using the negatively chargeable toner.Type: GrantFiled: December 31, 2002Date of Patent: August 17, 2004Assignee: Minolta Co., Ltd.Inventors: Masayuki Hagi, Junichi Tamaoki, Megumi Aoki, Hiroaki Kato
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Publication number: 20030129510Abstract: The present invention relates to a negatively chargeable toner, comprising:Type: ApplicationFiled: December 31, 2002Publication date: July 10, 2003Inventors: Masayuki Hagi, Junichi Tamaoki, Megumi Aoki, Hiroaki Kato
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Publication number: 20030108808Abstract: The present invention relates to a toner for developing an electrostatic latent image comprising a binder resin, a colorant, a first wax, and a second wax whose kind is different from that of the first wax, wherein the toner is prepared by a kneading-grinding method and integrated domains of the first wax and the second wax are dispersed in the binder resin.Type: ApplicationFiled: July 23, 2002Publication date: June 12, 2003Inventors: Masahide Inoue, Chikara Tsutsui, Yoshihiro Mikuriya, Yoshitaka Sekiguchi, Takeshi Arai, Megumi Aoki, Masahiro Anno
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Patent number: 6541173Abstract: The present invention provide a toner comprising: a coloring agent; a binder resin comprising a first binder resin and a second binder resin, the first binder resin being composed of a linear polyester resin having a number-average molecular weight (Mn) of from 2,500 to 7,000, a weight-average molecular weight (Mw) of from 8,000 to 25,000, and a Mw/Mn ratio of 2 to 4, the second binder resin being composed of a non-linear polyester resin having a number-average molecular weight (Mn) of from 3,500 to 11,000, a weight-average molecular weight (Mw) of from 40,000 to 250,000, and a Mw/Mn ratio of 10 to 35, and a ratio of the first binder resin to the second binder resin (the first binder resin:the second binder resin) being 15:85 to 85:15 by weight, a first releasing agent having a softening point of 55 to 110° C., and a second releasing agent having a softening point of 110 to 160° C.Type: GrantFiled: May 31, 2000Date of Patent: April 1, 2003Assignee: Minolta Co., Ltd.Inventors: Kenichi Kido, Masayuki Hagi, Takeshi Arai, Yoshihiro Mikuriya, Megumi Aoki, Yoshitaka Sekiguchi, Tetsuo Sano, Junichi Tamaoki
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Patent number: 6506530Abstract: The present invention provide a toner comprising: a coloring agent; a binder resin comprising a first binder resin and a second binder resin, the first binder resin being composed of a linear polyester resin having a number-average molecular weight (Mn) of from 2,800 to 7,000, a weight-average molecular weight (Mw) of from 8,900 to 21,000, and a Mw/Mn ratio of 2 to 4, the second binder resin being composed of a non-linear polyester resin having a number-average molecular weight (Mn) of from 3,500 to 8,000, a weight-average molecular weight (Mw) of from 40,000 to 120,000, and a Mw/Mn ratio of 10 to 20, and a ratio of the first binder resin to the second binder resin (the first binder resin:the second binder resin) being 60:40 to 95:5 by weight.Type: GrantFiled: May 31, 2000Date of Patent: January 14, 2003Assignee: Minolta Co., Ltd.Inventors: Kenichi Kido, Masayuki Hagi, Megumi Aoki, Yoshihiro Mikuriya, Takeshi Arai, Tetsuo Sano, Yoshitaka Sekiguchi, Junichi Tamaoki
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Patent number: 6503679Abstract: The present invention provides a color toner for developing an electrostatic image having excellent light transmission for OHP and fixing efficiency, said color toner effectively preventing a low temperature offset and a high temperature offset when it is applied to a fixing device whose coating weight of an oil is reduced. The color toner is characterized in that (i) it comprises a binding resin and a colorant, (ii) its storage elastic modulus at 90° C. (G′90) is not more than 6×104 Pa, (iii) its storage elastic modulus at 140° C. (G′140) is not less than 5×102 Pa, (iv) a temperature showing a maximum value of &dgr; in tan&dgr;=G″/G′ (wherein G′ is a storage elastic modulus of the color toner, and G″ is a loss elastic modulus of the color toner) exists in the range of 90-120° C., and (v) the maximum value of &dgr; is not less than 60°.Type: GrantFiled: August 3, 2001Date of Patent: January 7, 2003Assignee: Minolta Co., Ltd.Inventors: Megumi Aoki, Masahide Inoue, Yoshihiro Mikuriya, Masayuki Hagi
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Patent number: 6482561Abstract: The present invention relates to a toner that contains at least a binder resin and a colorant, characterized in that the toner has a temperature range of 90 to 110° C. at 2×103 (Pa) of a storage elastic modulus (G′) under 0.1 (Hz) of a frequency.Type: GrantFiled: August 25, 2000Date of Patent: November 19, 2002Assignee: Minolta Co., Ltd.Inventors: Takeshi Arai, Megumi Aoki, Yoshitaka Sekiguchi, Junichi Tamaoki, Yoshihiro Mikuriya, Tetsuo Sano, Masayuki Hagi, Kenichi Kido
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Publication number: 20020042013Abstract: The present invention provides a color toner for developing an electrostatic image having excellent light transmission for OHP and fixing efficiency, said color toner effectively preventing a low temperature offset and a high temperature offset when it is applied to a fixing device whose coating weight of an oil is reduced. The color toner is characterized in that (i) it comprises a binding resin and a colorant, (ii) its storage elastic modulus at 90° C. (G′90) is not more than 6×104Pa, (iii) its storage elastic modulus at 140° C. (G′140) is not less than 5×102Pa, (iv) a temperature showing a maximum value of &dgr; in tan &dgr;=G″/G′ (wherein G′ is a storage elastic modulus of the color toner, and G″ is a loss elastic modulus of the color toner) exists in the range of 90-120° C., and (v) the maximum value of &dgr; is not less than 60°.Type: ApplicationFiled: August 3, 2001Publication date: April 11, 2002Inventors: Megumi Aoki, Masahide Inoue, Yoshihiro Mikuriya, Masayuki Hagi
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Patent number: 6352808Abstract: The present invention relates to an additive agent for toner, comprising: inorganic particles; a first fatty-acid metal salt existing on the surface of the inorganic particles, the first fatty acid metal salt having a metal that is an alkali metal; and a second fatty-acid metal salt existing on the surface of the inorganic particles, the second fatty-acid metal salt having a metal other than an alkali metal, a ratio of the first fatty-acid metal salt to the second fatty-acid metal salt being set in a range of 0.01 to 0.5% by weight; and a toner containing toner particles and the additive agent.Type: GrantFiled: September 26, 2000Date of Patent: March 5, 2002Assignee: Minolta Co., Ltd.Inventors: Masayuki Hagi, Takeshi Arai, Yoshihiro Mikuriya, Yoshitaka Sekiguchi, Kenichi Kido, Megumi Aoki, Tetsuo Sano, Junichi Tamaoki
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Patent number: 6338929Abstract: The present invention provides a toner for developing an electrostatic latent image which suppresses an adhesion and wearability on a surface of a photosensitive member and exhibits an excellent rising property of an electrification. The toner comprises (i) toner particles containing a binder resin and a colorant, (ii) a first external additive consisting of first inorganic particles whose number-average particle size is 5-40 nm, (iii) a second external additive consisting of second inorganic particles whose number-average particle size, which is larger than that of the first external additive, is 20-160 nm, (iv) a third external additive consisting of third inorganic particles whose number-average particle size, which is larger than that of the second external additive, is 80-1200 nm, and (v) a fourth external additive consisting of a metal salt of fatty acid whose volume-average particle size is 1.5-12 &mgr;m, said four external additives being externally added to the toner particles.Type: GrantFiled: September 26, 2000Date of Patent: January 15, 2002Assignee: Minolta Co., Ltd.Inventors: Masayuki Hagi, Yoshihiro Mikuriya, Yoshitaka Sekiguchi, Kenichi Kido, Takeshi Arai, Megumi Aoki, Tetsuo Sano, Junichi Tamaoki
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Patent number: 6335135Abstract: The present invention relates to a toner comprising toner particles and an external additive comprising strontium titanate particles that have a number-average particle size of 80 to 800 nm and do not have a peak of strontium carbonate in qualitative analysis by X-ray diffraction.Type: GrantFiled: January 4, 2000Date of Patent: January 1, 2002Assignee: Minolta Co., Ltd.Inventors: Takeshi Arai, Junichi Tamaoki, Masayuki Hagi, Megumi Aoki
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Patent number: 6335134Abstract: The toner composition comprises an aliphatic higher alcohol (1) or a higher fatty acid (2): H&Parenopenst;CH2&Parenclosest;nOH (n: an integer) (1) H&Parenopenst;CH2&Parenclosest;mCOOH (m: an integer) (2) wherein number-average carbon atom numbers of the aliphatic higher alcohol or higher fatty acid ore 21-29, contents of the ingredients having carbon atom numbers of not more than 20 are not more than 2% by weight, and contents of the ingredients having carbon atom numbers of not less than 30 are not more than 2% by weight.Type: GrantFiled: August 1, 2000Date of Patent: January 1, 2002Assignee: Minolta Co., Ltd.Inventors: Masayuki Hagi, Yoshihiro Mikuriya, Takeshi Arai, Kenichi Kido, Yoshitaka Sekiguchi, Tetsuo Sano, Megumi Aoki, Junichi Tamaoki
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Patent number: 6132920Abstract: The present invention relates to a toner comprising:toner particles containing a binder resin and a colorant; andan external addition agent that is admixed with the toner particles,the external addition agent comprising titanium oxide particles which are produced through a vapor-phase oxidizing method and has a number-average particle size of 0.1 to 0.7 .mu.m.Type: GrantFiled: November 8, 1999Date of Patent: October 17, 2000Assignee: Minolta Co., Ltd.Inventors: Masayuki Hagi, Junichi Tamaoki, Takeshi Arai, Megumi Aoki