Patents Assigned to Teijin Ltd.
  • Patent number: 6649723
    Abstract: A molding composition comprising a (co)polymer of vinylcyclohexane is disclosed. The copolymer is characterized in having an absolute molecular weight Mw of 100,000 to 450,000 g/mol, polydispersity index of 1 to 3 and maximum melt viscosity of 1000 Pa·s, as measured at 300° C. and at a shear rate of 1000 sec−1. The composition is suitable for producing a variety of molded article most notably optical data storage media.
    Type: Grant
    Filed: March 4, 2002
    Date of Patent: November 18, 2003
    Assignees: Bayer Aktiengesellschaft, Teijin Ltd.
    Inventors: Volker Wege, Friedrich-Karl Bruder, Konstadinos Douzinas, Yun Chen
  • Patent number: 6617056
    Abstract: A transparent conductive laminate in which a crystalline transparent conductive film substantially made of In—Sn—O on a transparent substrate composed of a thermoplastic polymer film, is provided. The crystalline part of the transparent conductive film (ITO-film) has a specific crystalline structure in which the X-ray diffraction intensity from the (222) crystal plane or the (440) crystal plane is highest, and [X440/222], the ratio of the X-ray diffraction intensity from the (440) crystal plane to that from the (222) crystal plane, is within the range of 0.2 to 2.5. The laminate has a low resistivity, and it is useful as an electrode material for a liquid crystal display, an electroluminescence device, a touch panel or the like. The transparent conductive laminate can be manufactured by combining the control of film fabricating atmosphere during sputtering and a heat treatment under specific conditions after film fabricating.
    Type: Grant
    Filed: October 23, 2000
    Date of Patent: September 9, 2003
    Assignee: Teijin Ltd.
    Inventors: Hiroshi Hara, Seiji Tsuboi
  • Patent number: 6509510
    Abstract: Process for hydrogenating aromatic polymers in the presence of catalysts, wherein a metal or mixture of metals from group VIII of the Periodic Table together with a support of silicon dioxide, aluminium dioxide or a mixture thereof is used as the catalyst, and the catalyst pore volume defined by pores of diameters between 100 and 1000 Å, measured by mercury porosimetry, is generally from 100 to 15%, in relation to the total pore volume, measured by mercury porosimetry.
    Type: Grant
    Filed: January 16, 2001
    Date of Patent: January 21, 2003
    Assignees: Bayer Aktiengesellschaft, Teijin Ltd.
    Inventors: Volker Wege, Johann Rechner, Eberhard Zirngiebl
  • Patent number: 6492468
    Abstract: The present invention relates to block copolymers which are predominantly based on vinylcyclohexane and to a process for producing them. The block copolymers can be processed to form mouldings by extrusion or injection moulding. The mouldings which result therefrom are distinguished by their high resistance to thermal deformation, good mechanical properties, high transparency in the visible and near UV range, and by their particularly low birefringence and water absorption.
    Type: Grant
    Filed: May 22, 2001
    Date of Patent: December 10, 2002
    Assignees: Bayer Aktiengesellschaft, Teijin Ltd.
    Inventors: Yun Chen, Friedrich-Karl Bruder, Volker Wege, Konstadinos Douzinas, Ralf Dujardin
  • Patent number: 6417287
    Abstract: A process for the hydrogenation of aromatic polymers is disclosed. Accordingly, the solvent used comprise an ether that contains no &agr;-hydrogen atom on a carbon atom adjacent to the ether function. The process results in virtually complete hydrogenation of the aromatic units.
    Type: Grant
    Filed: June 12, 2000
    Date of Patent: July 9, 2002
    Assignees: Bayer Aktiengesellschaft, Teijin Ltd.
    Inventors: Volker Wege, Johann Rechner
  • Patent number: 6355161
    Abstract: A set of bottles for containing dialysate chemical formulations, chemical cleaning agents or the like is described. The chemical formulation bottles come in two varieties, sodium bicarbonate and liquid acid formulations, each bottle having a slightly different shape. The different shapes cooperate with a bottle mounting structure in the dialysis machine to insure that bottles are correctly installed on their respective bottle opening mechanism. The bottles also have a detection feature comprising either a raised rim or groove extending around the periphery of the bottle. A sensor assembly in the bottle mounting and opening system detects the detection feature. The detection feature is used by the machine to distinguish between dialysate formulation bottles and chemical cleaning bottles, which do not have the detection feature. The detection feature prevents unintentional installation of the chemical bottle on the opening mechanism for the dialysate chemical formulation bottles.
    Type: Grant
    Filed: April 14, 2000
    Date of Patent: March 12, 2002
    Assignees: Aksys, Ltd., Teijin, Ltd.
    Inventors: Dilip H. Shah, Gary Howell, Kenneth E. Pawlak, Masatoshi Ozono, Wade Fournier, Mete Alpan
  • Patent number: 6133358
    Abstract: A non-halogen flame retardant polyester resin composition shows high flame retardancy with a small amount of a flame retardant, provides a molded product not causing dripping at the time of combustion, is excellent in mechanical strength and resin knead-processability, and is free from bleed-out by annealing, wherein the resin composition comprises 100 parts by weight of a polyester such as polytetramethylene terephthalate, 1 to 15 parts by weight of coated red phosphorus powder and 3 to 70 parts by weight of a novolak phenol resin.
    Type: Grant
    Filed: September 10, 1998
    Date of Patent: October 17, 2000
    Assignee: Teijin Ltd.
    Inventors: Mioko Suzuki, Noritsugu Saiki
  • Patent number: 6103368
    Abstract: The present invention provides an antistatic polyester film having an antistatic layer formed of an antistatic agent (A) composed mainly of a polymer having a recurring unit of a structure expressed by the following formula (I) on at least one surface of a polyester film ##STR1## wherein R.sup.1 and R.sup.2 are each H or CH.sub.3, R.sup.3 is an alkylene group having a carbon number of 2 to 10, R.sup.4 and R.sup.5 are each a saturated hydrocarbon group having a carbon number of 1 to 5, R.sup.6 is an alkylene group having a carbon number of 2 to 5, n is a number of 0 to 40, m is a number of 1 to 40, and Y.sup.- is a halogen ion, a mono- or polyhalogenated alkyl ion, nitrate ion, sulfate ion, an alkylsulfate ion, sulfonate ion or an alkylsulfonate ion.
    Type: Grant
    Filed: February 27, 1998
    Date of Patent: August 15, 2000
    Assignee: Teijin Ltd.
    Inventors: Masayuki Fukuda, Satoshi Kitazawa, Shin-ichiro Okada, Hiroshi Tomita
  • Patent number: 5958553
    Abstract: A biaxially oriented polyethylene-2,6-naphthalate film suitable for producing magnetic recording media wherein the film has a Young's modulus of at least 550 kg/mm.sup.2 in the longitudinal direction and a Young's modulus of at least 800 kg/mm.sup.2 in the transverse direction with the Young's modulus in the transverse direction being greater than the Young's modulus in the longitudinal direction by more than 200 kg/mm.sup.2 ; a surface roughness Ra of 1-12 nm; and low heat shrinkage. The film also contains 0.005-2% by weight inorganic or organic fine particles.
    Type: Grant
    Filed: February 3, 1997
    Date of Patent: September 28, 1999
    Assignee: Teijin Ltd.
    Inventors: Masahiro Hosoi, Hisashi Hamano, Yasuhiro Saeki, Masami Etchu
  • Patent number: 5470665
    Abstract: Provided is a biaxially oriented, unidirectionally long polyethylene-2,6-naphthalenedicarboxylate film having the following characteristic properties;(A) both the Young's modulus in the longitudinal direction and the Young's modulus in the transverse direction are at least 600 kg/mm.sup.2, and the Young's modulus in the longitudinal direction is greater than the Young's modulus in the transverse direction,(B) the heat shrinkage factor in the transverse direction when the film has been treated under no load at 105.degree. C. for 30 minutes is at least 1%, and(C) the surface roughness Ra of one surface of the film is up to 5 nm, anda magnetic recording tape obtained by forming a thin magnetic metal film on the above film undergoes no curling, has high coercive force, has excellent electromagnetic conversion characteristic and permits high-density recording for a long period of time.
    Type: Grant
    Filed: March 30, 1995
    Date of Patent: November 28, 1995
    Assignee: Teijin, Ltd.
    Inventors: Hisashi Hamano, Masahiro Hosoi, Ieyasu Kobayshi, Yasuhiro Saeki
  • Patent number: 5463015
    Abstract: There is provided a biaxially oriented polyester base film for a magnetic tape for use in a cassette for a digital audio tape recorder. The film has (a) a stress when the biaxially oriented polyester base film is extended in the longitudinal direction by 5% of at least 12 kg/mm.sup.2, (b) a residual extension in the longitudinal direction of 0.2% or less and a residual extension in the transverse direction of 0.3% or less, (c) a heat shrinkage in the longitudinal direction of 1.5% or less, (d) at least one surface of which has a surface roughness, Ra, of 25 nm or less, and (e) a film thickness of in the range of from 3 to 12 .mu.m. A magnetic tape for use in a cassette for a digital audio tape recorder is also provided.
    Type: Grant
    Filed: December 7, 1994
    Date of Patent: October 31, 1995
    Assignee: Teijin Ltd.
    Inventors: Takao Chujo, Hisashi Hamano, Masanori Nishiyama, Yasuhiro Saeki, Tatsuya Ogawa, Kouhei Endou
  • Patent number: 5188881
    Abstract: A thermosensitive stencil paper is composed of a substrate and a thermoplastic resin film formed thereon, which thermoplastic resin film has projections in the surface portion thereof, with a printing roughness (R.sub.p) of 2.2 to 5.0 .mu.m, which is a physical quantity proportional to the average depth of the depressions in the surface portion thereof pressed against a standard surface.
    Type: Grant
    Filed: June 20, 1991
    Date of Patent: February 23, 1993
    Assignees: Ricoh Company, Ltd., Teijin Ltd.
    Inventors: Shoichi Sugiyama, Fumiaki Arai, Masayasu Nonogaki, Yuji Natori, Hideyuki Yamaguchi, Hitoshi Ueda, Hiroshi Tomita, Kotaro Kato
  • Patent number: 5175043
    Abstract: The present invention lies in a process for modifying the surface of a molded article, which process comprises irradiating the surface of a molded article composed of an aromatic polymer or a polymer composition containing said aromatic polymer, with an ultraviolet laser beam having a wavelength of about 150 nm-380 nm at a fluence at least lower than the threshold to modify the surface as compared with the condition before the irradiation. The process makes it possible to modify the condition of the laser beam-irradiated surface portions of the molded article to, for example, a white color or black color, whereby the molded article can be endowed with functions and properties required in its use in various applications.
    Type: Grant
    Filed: January 7, 1991
    Date of Patent: December 29, 1992
    Assignees: Teijin Ltd., Agency of Industrial Science, Kabushiki Kaisha DJK Res Center, NEC Corp.
    Inventors: Akira Yabe, Hiroyuki Niino, Shozaburo Nagano, Masahiro Hosoi, Takatoshi Kuratsuji, Kazuaki Hotta, Masashi Nakano
  • Patent number: 5043281
    Abstract: Human monoclonal antibodies against cytomegalovirus. These antibodies can be advantageously used as a diagnostic, or preventive and remedy for cytomegalovirus infectious diseases.
    Type: Grant
    Filed: September 27, 1990
    Date of Patent: August 27, 1991
    Assignee: Teijin Ltd.
    Inventors: Yasuhiko Masuho, Toru Sugano, Yoh-ichi Matsumoto, Shigeki Fujinaga
  • Patent number: 4840762
    Abstract: A process for the preparation of high-performance grade carbon fibers, which comprises attaching a fine powder of at least one member selected from oxides and carbides of silicon, aluminum, titanium, and boron to a precursor fiber bundle of as spun pitch fibers, subjecting the fiber bundle to an infusibilization treatment, and subjecting the fiber bundle to a carbonization treatment.
    Type: Grant
    Filed: October 22, 1985
    Date of Patent: June 20, 1989
    Assignee: Teijin Ltd.
    Inventors: Toru Sawaki, Hideharu Sasaki, Tsutomu Nakamura, Jiro Sadanobu
  • Patent number: 4814176
    Abstract: A sustained release preparation comprising:(a) chitin, chitosan, or a mixture thereof(b) anionic polymer compounds such as those having a carboxyl group, a sulfonic acid group, or a group capable of providing the same, and(c) pharmaceutically active agents.This sustained release preparation can provide the desired sustained-release or dissolution of the pharmaceutically active agents in human organs irrespective of the acidity (i.e., pH conditions) therein.
    Type: Grant
    Filed: January 10, 1986
    Date of Patent: March 21, 1989
    Assignee: Teijin Ltd.
    Inventors: Yuji Makino, Hideo Matugi, Yoshiki Suzuki
  • Patent number: D435646
    Type: Grant
    Filed: October 12, 1999
    Date of Patent: December 26, 2000
    Assignees: Aksys, Ltd., Teijin, Ltd.
    Inventors: Dilip H. Shah, Gary Howell, Kenneth E. Pawlak, Masatoshi Ozono
  • Patent number: D435647
    Type: Grant
    Filed: October 12, 1999
    Date of Patent: December 26, 2000
    Assignees: Aksys, Ltd., Teijin, Ltd.
    Inventors: Dilip H. Shah, Gary Howell, Kenneth E. Pawlak, Masatoshi Ozono
  • Patent number: D435648
    Type: Grant
    Filed: October 12, 1999
    Date of Patent: December 26, 2000
    Assignees: Aksys Ltd., Teijin, Ltd.
    Inventors: Dilip H. Shah, Gary Howell, Kenneth E. Pawlak, Masatoshi Ozono
  • Patent number: D435649
    Type: Grant
    Filed: October 12, 1999
    Date of Patent: December 26, 2000
    Assignees: Aksys, Ltd., Teijin, Ltd.
    Inventors: Dilip H. Shah, Gary Howell, Kenneth E. Pawlak, Masatoshi Ozono