Patents by Inventor Mitsuru Hashimoto

Mitsuru Hashimoto 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).

  • Publication number: 20020147347
    Abstract: Aromatic methylidene compounds of the following general formula 1
    Type: Application
    Filed: January 24, 2002
    Publication date: October 10, 2002
    Applicant: Matsushita Electirc Industrial Co., Ltd.
    Inventor: Mitsuru Hashimoto
  • Patent number: 6277503
    Abstract: The present invention provides an organic electroluminescent component in which use is made of the particular aromatic methylidene compound represented by the general formula (1). The component of the invention has the ability of high brightness luminescence with stability in low voltage application.
    Type: Grant
    Filed: March 2, 1999
    Date of Patent: August 21, 2001
    Assignee: Matsushita Electric Idustrial Co., LTD
    Inventors: Mitsuru Hashimoto, Mutsumi Suzuki, Masao Fukuyama
  • Patent number: 5816134
    Abstract: A compressor has a piston (11) that reciprocates between a top dead center and a bottom dead center in a cylinder bore (2a) by means of a driving body (9) mounted on a rotary shaft (6) in a crank chamber (5) during the rotation of the rotary shaft (6). The piston (11) has an outer circumferential surface that slides against an inner circumferential surface of the cylinder bore (2a). The outer circumferential surface of the piston (11) is provided with a groove (17; 44; 46) extending in the direction of an axis (S) of the piston (11). During reciprocation of the piston (11), lubricating oil adhered to the inner circumferential surface of the cylinder bore (2a) is collected in the groove (17; 44; 46). When the groove (17; 44; 46) is exposed to the inside of the crank chamber (5) from the cylinder bore (2a) during the reciprocation of the piston (11), the lubricating oil in the groove (17; 44; 46) is supplied to the inside of the crank chamber (5).
    Type: Grant
    Filed: June 5, 1997
    Date of Patent: October 6, 1998
    Assignee: Kabushiki Kaisha Toyoda Jidoshokki Seisakusho
    Inventors: Kenji Takenaka, Hiroaki Kayukawa, Takahiro Hamaoka, Takashi Michiyuki, Mitsuru Hashimoto, Masahiro Kawaguchi
  • Patent number: 5616801
    Abstract: Charge transporting materials having general formula (I): ##STR1## wherein R.sup.1 represents hydrogen; an unsubstituted or substituted alkyl group; an alkoxyl group having 1 to 4 carbon atoms; a thioalkoxyl group having 1 to 4 carbon atoms; an aryloxy group; an aralkyl group; a nitro group; an unsubstituted or substituted aryl group; a halogen; an amino group; an unsubstituted or substituted dialkylamino group; R.sup.2 represents hydrogen; an unsubstituted or substituted alkyl group; an alkoxyl group having 1 to 4 carbon atoms; or a halogen; R.sup.3 represents hydrogen; an alkyl group having 1 to 4 carbon atoms; an alkoxyl group having 1 to 4 carbon atoms; a halogen; a dialkylamino group; an amino group; a thioalkoxyl group having 1 to 4 carbon atoms; an aryloxy group; a methylenedioxy group; an aralkyl group; or an unsubstituted or substituted aryl group; represents R.sup.
    Type: Grant
    Filed: October 25, 1994
    Date of Patent: April 1, 1997
    Assignee: Ricoh Company, Ltd.
    Inventors: Tomoyuki Shimada, Masaomi Sasaki, Mitsuru Hashimoto, Tamotsu Aruga
  • Patent number: 5499515
    Abstract: A vane-type rotary refrigerant compressor adapted for use in an air conditioning system is disclosed which includes a rotor fixed on a drive shaft for rotation therewith and disposed in an elliptical chamber of a cylinder block which is enclosed by a housing and whose axial ends are closed by front and rear side plates. The rotor has a plurality of slots in which vanes are slidably received so that a plurality of compression chambers are formed during the operation of the compressor. An oil separator compartment is defined by the housing and the rear side plate, communicating with a discharge chamber into which compressed refrigerant is discharged. In the rear side plate is formed a discharge passage establishing communication between the discharge chamber and the oil separator compartment. The discharge passage has a restricted portion and a bend so as to provide resistance against the flow of the compressed refrigerant for damping its pulsating stream.
    Type: Grant
    Filed: June 21, 1994
    Date of Patent: March 19, 1996
    Assignee: Kabushiki Kaisha Toyoda Jidoshokki Seisakusho
    Inventors: Chuichi Kawamura, Ichiro Kasugai, Mitsuru Hashimoto, Masahiro Ida
  • Patent number: 5462826
    Abstract: Charge transporting materials having general formula (I): ##STR1## wherein R.sup.1 represents hydrogen; an unsubstituted or substituted alkyl group; an alkoxyl group having 1 to 4 carbon atoms; a thioalkoxyl group having 1 to 4 carbon atoms; an aryloxy group; an aralkyl group; a nitro group; an unsubstituted or substituted aryl group; a halogen; an amino group; an unsubstituted or substituted dialkylamino group; R.sup.2 represents hydrogen; an unsubstituted or substituted alkyl group; an alkoxyl group having 1 to 4 carbon atoms; or a halogen; R.sup.3 represents hydrogen; an alkyl group having 1 to 4 carbon atoms; an alkoxyl group having 1 to 4 carbon atoms; a halogen; a dialkylamino group; an amino group; a thioalkoxyl group having 1 to 4 carbon atoms; an aryloxy group; a methylenedioxy group; an aralkyl group; or an unsubstituted or substituted aryl group; R.sup.
    Type: Grant
    Filed: February 17, 1994
    Date of Patent: October 31, 1995
    Assignee: Ricoh Company, Ltd.
    Inventors: Tomoyuki Shimada, Masaomi Sasaki, Mitsuru Hashimoto, Tamotsu Aruga
  • Patent number: 5459247
    Abstract: Bisazo compounds useful as charge generating materials having formula (I) are disclosed: ##STR1## wherein R represents hydrogen, an alkyl group having 1 to 4 carbon atoms, an alkoxyl group having 1 to 4 carbon atoms or a nitro group.
    Type: Grant
    Filed: February 25, 1994
    Date of Patent: October 17, 1995
    Assignee: Ricoh Company, Ltd.
    Inventor: Mitsuru Hashimoto
  • Patent number: 5377899
    Abstract: Of two sheet-like solder stocks, one sheet-like solder stock is fed at a constant speed, and additive particles having a constant particle diameter are spread on an upper surface of the one solder material sheet in a quantitative fixed quantity. The other sheet-like solder stock is stacked on the upper surface of the one sheet-like solder stock, and the two stacked solder stocks are rolled and integrally laminated by rollers. The laminated solder sheet is cut into a plurality of narrow solder strips. Each of the solder strips is wound on a reel, and supplied as a die bonding material capable of being used for the die bonding. Thus, if this solder is used for a semiconductor chip die bonding, the unevenness in thickness of the solder layer directly under the die-bonded semiconductor chip becomes small, and it is possible to minimize the error in the semiconductor chip recognition in the case of the wire bonding.
    Type: Grant
    Filed: January 31, 1994
    Date of Patent: January 3, 1995
    Assignee: NEC Corporation
    Inventor: Mitsuru Hashimoto
  • Patent number: 5370954
    Abstract: An electrophotographic photoconductor is composed of an electroconductive support and a photoconductive layer formed thereon which contains a charge generating material and a charge transporting material. The charge generating material is composed of a particular triasazo compound and a particular disazo compound. A photoconductive composition useful as a photoconductive material is also composed of the trisazo compound and the disazo compound.
    Type: Grant
    Filed: April 16, 1993
    Date of Patent: December 6, 1994
    Assignee: Ricoh Company, Ltd.
    Inventors: Katsuichi Ohta, Masaomi Sasaki, Mitsuru Hashimoto, Kazuya Ishida, Tomoyuki Shimada
  • Patent number: 5344735
    Abstract: An electrophotographic photoconductor is disclosed, which comprises an electroconductive support and a photoconductive layer formed thereon comprising a bisazo pigment having the formula (I) serving as a charge generating material: ##STR1## wherein Ar represents a residual group of a coupler represented by ArH selected from the group consisting of: an aromatic hydrocarbon compound having a hydroxyl group, a heterocyclic compound having a hydroxyl group, an aromatic hydrocarbon compound having an amino group, a heterocyclic compound having an amino group, an aromatic hydrocarbon compound having a hydroxyl group and an amino group, a heterocyclic compound having a hydroxyl group and an amino group, an aliphatic compound having an enolic ketone group, and an aromatic hydrocarbon compound having an enolic ketone group. Further, charge generating materials and novel bisazo pigments for use in the electrophotographic photoconductor are disclosed.
    Type: Grant
    Filed: August 5, 1992
    Date of Patent: September 6, 1994
    Assignee: Ricoh Company, Ltd.
    Inventors: Masaomi Sasaki, Tomoyuki Shimada, Mitsuru Hashimoto
  • Patent number: 5317093
    Abstract: Bisazo compounds, useful as organic photoconductive materials, having formula (I) or (II) are disclosed: ##STR1## wherein R represents hydrogen, an alkyl group having 1 to 4 carbon atoms, an alkoxy group having 1 to 4 carbon atoms or a nitro group; ##STR2## wherein A and B independently represent hydrogen or chloride provided that either A or B represents chloride.
    Type: Grant
    Filed: September 19, 1991
    Date of Patent: May 31, 1994
    Assignee: Ricoh Company, Ltd.
    Inventor: Mitsuru Hashimoto
  • Patent number: 5260156
    Abstract: A charge transporting material comprising a 1,3-pentadiene derivative having formula I):A--CH.dbd.CH--CH.dbd.CH--CH.sub.2 --A (I)wherein A represents a 9-anthryl group which may have a substituent, a N-substituted carbazolyl group which may have a substitutent, a N-substituted- phenothiazinyl group which may have a substituent or ##STR1## in which Ar represents an arylene group which may have a substituent, R.sup.1 and R.sup.2 each represent an alkyl group which may have a substituent, an aralkyl group which may have a substituent, or an aryl group which may have a substituent; an electrophotographic photoconductor comprising an electroconductive support and a photoconductive layer formed thereon, which comprises as an effective component at least one of the 1,3-pentadiene derivatives of the above formula (I); and novel 1,3-pentadiene derivatives of the formula (I), provided that in the formula I), R.sup.1 and R.sup.2 cannot be a methyl group at the same time, are disclosed.
    Type: Grant
    Filed: July 2, 1992
    Date of Patent: November 9, 1993
    Assignees: Ricoh Company, Ltd., Hodogaya Chemical Co., Ltd.
    Inventors: Mitsuru Hashimoto, Masaomi Sasaki, Tomoyuki Shimada, Nobuo Suzuki, Takayuki Sakai, Susumu Suzuka
  • Patent number: 5252750
    Abstract: Polyolefin derivatives, which are useful not only as the photoconductive materials for electrophotography, but also as a charge transporting material employed in a function-separating type photoconductor which uses an organic or inorganic pigment as a charge generating material, and an electrophotographic photoconductor containing at least one of the above polyolefin derivatives in a photoconductive layer thereof, are disclosed.
    Type: Grant
    Filed: June 3, 1991
    Date of Patent: October 12, 1993
    Assignees: Ricoh Company, Ltd., Hodogaya Chemical Company, Ltd.
    Inventors: Mitsuru Hashimoto, Tomoyuki Shimada, Nobuo Suzuki, Takayuki Sakai, Susumu Suzuka, Masaomi Sasaki
  • Patent number: 5250733
    Abstract: Benzylideneindene compounds, which are useful not only as the photoconductive material for electrophotography, but also as a charge transporting material employed in a function-separating type photoconductor in which an organic or inorganic pigment is used as a charge generating material, and an electrophotographic photoconductor containing at least one of the above benzylideneindene compounds in a photoconductive layer thereof, are disclosed.
    Type: Grant
    Filed: February 19, 1992
    Date of Patent: October 5, 1993
    Assignee: Ricoh Company, Ltd.
    Inventors: Tamotsu Aruga, Masaomi Sasaki, Mitsuru Hashimoto
  • Patent number: 5250377
    Abstract: Aromatic diolefinic compounds including 1,4-divinylbenzene derivatives, which are useful not only as organic photoconductive materials for electrophotography, but also as intermediates for producing diethyl aromatic compounds which are also useful as organic photoconductive materials for electrophotography, the aromatic diethyl compounds, an electrophotographic photoconductor containing any of the above aromatic diethyl compounds in a photosensitive layer thereof, and a charge transporting medium containing any of the aromatic diethyl compound are disclosed.
    Type: Grant
    Filed: February 21, 1992
    Date of Patent: October 5, 1993
    Assignee: Ricoh Company, Ltd.
    Inventors: Tomoyuki Shimada, Masaomi Sasaki, Mitsuru Hashimoto
  • Patent number: 5166438
    Abstract: A charge transporting material comprising a 1,3-pentadiene derivative having formula (I):A--CH.dbd.CH--CH.dbd.CH--CH.sub.2 --A (I)wherein A represents a 9-anthryl group which may have a substituent, a N-substituted carbazolyl group which may have a substituent, a N-substituted phenothiazinyl group which may have a substituent or ##STR1## in which Ar represents an arylene group which may have a substituent, R.sup.1 and R.sup.2 each represent an alkyl group which may have a substituent, an aralkyl group which may have a substituent, or an aryl group which may have a substituent; an electrophotographic photoconductor comprising an electroconductive support and a photoconductive layer formed thereon, which comprises as an effective component at least one of the 1,3-pentadiene derivatives of the above formula (I); and novel 1,3-pentadiene derivatives of the formula (I), provided that in the formula (I), R.sup.1 and R.sup.2 cannot be a methyl group at the same time, are disclosed.
    Type: Grant
    Filed: August 23, 1991
    Date of Patent: November 24, 1992
    Assignees: Ricoh Company, Ltd., Hodogaya Chemical Co., Ltd.
    Inventors: Mitsuru Hashimoto, Masaomi Sasaki, Tomoyuki Shimada, Nobuo Suzuki, Takayuki Sakai, Susumu Suzuka
  • Patent number: 5159087
    Abstract: Aromatic diolefinic compounds including 1,4-divinylbenzene derivatives, which are useful not only as organic photoconductive materials for electrophotography, but also as intermediates for producing diethyl aromatic compounds which are also useful as organic photoconductive materials for electrophotography, the aromatic diethyl compounds, an electrophotographic photoconductor containing any of the above aromatic diethyl compounds in a photosensitive layer thereof, and a charge transporting medium containing any of the aromatic diethyl compound are disclosed.
    Type: Grant
    Filed: January 17, 1991
    Date of Patent: October 27, 1992
    Assignee: Ricoh Company, Ltd.
    Inventors: Tomoyuki Shimada, Masaomi Sasaki, Mitsuru Hashimoto
  • Patent number: 5118986
    Abstract: An electroluminescent device having:an anode and a cathode; andat least two organic compound layers sandwiched between said two electrodes,at least one of said organic compound layers being a hole transporting layer containing a compound represented by the following general formula (I) ##STR1## wherein R.sup.1 represents hydrogen atom, a lower alkyl group, a lower alkoxy groups, a halogen or a nitro group, A represents ##STR2## (wherein R.sup.2 represents a lower alkyl group, a substituted or non-substituted aryl group or an aralkyl group, and R.sup.3 represents a lower alkyl group.
    Type: Grant
    Filed: June 21, 1990
    Date of Patent: June 2, 1992
    Assignee: Ricoh Company, Ltd.
    Inventors: Teruyuki Ohnuma, Fumio Kawamura, Masafumi Ohta, Yohta Sakon, Toshihiko Takahashi, Mitsuru Hashimoto
  • Patent number: 5097022
    Abstract: An electrophotographic photoconductor comprises an electroconductive support and a photoconductive layer formed thereon comprising a bisazo compound having the formula (I) serving as a charge generating material: ##STR1## wherein Y represents a halogen, an alkyl group which may have a substituent, an alkoxyl group, an acyl group, a substituted amino group, a cyano group or a nitro group; R represents hydrogen, or an alkyl group which may have a substitutent; and Ar represents an aryl group which may have a substituent.
    Type: Grant
    Filed: November 3, 1989
    Date of Patent: March 17, 1992
    Assignee: Ricoh Company, Ltd.
    Inventors: Masaomi Sasaki, Tomoyuki Shimada, Mitsuru Hashimoto
  • Patent number: 5077142
    Abstract: Disclosed herein an electroluminescent device for converting an energy of an electric field applied directly to a light energy and capable of producing surface luminescent for a large area different from conventional incandescent lamps, fluorescent lamps or light emitting diodes.
    Type: Grant
    Filed: April 19, 1990
    Date of Patent: December 31, 1991
    Assignee: Ricoh Company, Ltd.
    Inventors: Yohta Sakon, Teruyuki Ohnuma, Mitsuru Hashimoto, Shogo Saito, Tetsuo Tsutsui, Chihaya Adachi