Patents by Inventor Niro Tarumi
Niro Tarumi 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).
-
Patent number: 5147396Abstract: An intraocular lens whose optic or optic and haptic are composed of a substantially soft polymer obtained by curing a composition comprising:(a) a dimethylsiloxane-phenylsiloxane copolymer having a vinyl group at each of the both terminals of the molecular chain,(b) a diorganopolysiloxane having at least three hydrosilyl groups in the molecule, and(c) an U.V. absorber.The intraocular lens obtained above has good intraocular stability, excellent biocompatibility, high optical properties and an U.V. absorbability closer to that of the human lens.By further incorporting a filler as the component (d), the intraocular lens has improved mechanical properties and higher intraocular stability.Type: GrantFiled: March 23, 1989Date of Patent: September 15, 1992Assignee: Hoya CorporationInventors: Mayumi Kageyama, Takeyuki Sawamoto, Niro Tarumi, Hiroshi Sakai
-
Patent number: 5008354Abstract: The contact lens of the present invention consisting of a polymer comprising, as an essential component, at least one fluorine-containing monomer represented by the general formula ##STR1## (R.sub.1 and R.sub.2 are independently H or CH.sub.3 and may be the same or different, l is an integer of 1-5, m is an integer of 1-2, n is an integer of 4-10, p is an integer of 8 or more, q is an integer of 0 or more, and p+q=2n+1), has high transparency, improved oxygen permeability, flexibility, hydrophilicity and no water absorbability.Type: GrantFiled: April 26, 1989Date of Patent: April 16, 1991Assignee: Hoya CorporationInventors: Takeyuki Sawamoto, Masashi Nomura, Niro Tarumi
-
Patent number: 4892402Abstract: A contact lens is made hydrophilic by contacting the lens with a treating solution containing a hydrophilic monomer, at least one photosensitizer selected from aromatic ketones or quinones, and a sovlent, and thereafter irradiating the contact lens with ultraviolet light.Type: GrantFiled: April 28, 1988Date of Patent: January 9, 1990Assignee: Hoya CorporationInventors: Takeyuki Sawamoto, Koichi Ishida, Niro Tarumi, Tetsuro Izumitani
-
Patent number: 4761438Abstract: A soft contact lens having a high water content, high mechanical strength and good dimensional stability is disclosed, which is made of a copolymer comprised of at least one monomer represented by formula (1): ##STR1## wherein R.sup.1 and R.sup.2 each represents hydrogen atom, methyl group, or ethyl group, and n.sub.1 represents 0 or an integer of 1 to 3.Type: GrantFiled: November 7, 1986Date of Patent: August 2, 1988Assignee: Hoya CorporationInventors: Shigeo Komiya, Niro Tarumi, Hideyuku Futamura
-
Patent number: 4650843Abstract: When trifluoroethyl methacrylate, hexafluoroisopropyl methacrylate, pentafluoro-n-propyl methacrylate and/or pentafluoro-n-butyl methacrylate which are fluorine-containing monomers, are added to a conventional monomer mixture for producing a soft contact lens, the resulting soft contact lens has the same optical properties and elasticity as conventional soft contact lenses have, and is very superior to the conventional ones in resistance to deposit and in shape stability.Type: GrantFiled: January 2, 1985Date of Patent: March 17, 1987Assignee: Hoya Lens CorporationInventors: Yuuichi Yokoyama, Eiichi Masuhara, Yoshinori Kadoma, Niro Tarumi, Makoto Tsuchiya
-
Patent number: 4625009Abstract: A high-hydration contact lens having a high strength is disclosed which is made of a copolymer composed of (i) 40 to 90 wt. % of N,N-dimethyl acrylamide, (ii) 5 to 50 wt. % of a hydrophobic monomer, (iii) 0.1 to 10 wt. % of an unsaturated carboxylic acid having one ethylenically unsaturated bond, and (iv) 0.01 to 5.0 wt. % of a crosslinking agent, wherein the hydrophobic monomer is selected from the group consisting of phenyl acrylates, benzyl acrylates, phenyl methacrylates, benzyl methacrylates, alkyl acrylates, alkyl methacrylates, cyclohexyl acrylates and cyclohexyl methacrylates, and the crosslinking agent is selected from those represented by formula (I), (II), or (III) ##STR1## wherein X represents a hydrogen atom or a methyl group, a is an integer of 2 to 23, and b and c each is an integer of 2 to 14.Type: GrantFiled: March 31, 1986Date of Patent: November 25, 1986Assignee: Hoya CorporationInventors: Tetsuro Izumitani, Niro Tarumi, Shigeo Komiya, Takeyuki Sawamoto
-
Patent number: 4528351Abstract: A plastic lens of a stepped segment having an excellent surface hardness can be obtained at high molding efficiency from cast polymerization of a diethylene glycol bisallyl carbonate and specified acrylate(s) system further added with a specified diacrylate(s) and/or dimethacrylate(s).Type: GrantFiled: July 22, 1982Date of Patent: July 9, 1985Assignee: Hoya Lens CorporationInventors: Niro Tarumi, Yoichi Okubo, Seiichi Yoshimoto
-
Patent number: 4393184Abstract: A lens having a high refractive index with a low dispersion produced by copolymerizing a polyfunctional allyl monomer with at least one monomer selected from the group represented by the general formula A: ##STR1## X: H, CH.sub.3, Cl Y: H, CH.sub.3, C.sub.2 H.sub.5, n-C.sub.3 H.sub.7, iso-C.sub.3 H.sub.7, OCH.sub.3, C.sub.6 H.sub.11, Cl, Br, CH.sub.2 Cl, CH.sub.2 Br, C.sub.6 H.sub.5, CH.sub.2 C.sub.6 H.sub.5, SCH.sub.3m=0, 1, 2n=0, 1, 2, 3, 4, 5.This lens is excellent in its transmittance, pencil hardness, impact resistance, dyeability, coating adhesion, solvent resistance, workability, etc.Type: GrantFiled: October 26, 1981Date of Patent: July 12, 1983Assignee: Hoya Lens CorporationInventors: Niro Tarumi, Shigeo Komiya, Mitsuo Sugimura
-
Patent number: 4373076Abstract: A high refractive lens of a terpolymer produced by the polymerization of ternary monomers comprising diethylene glycol bisallyl carbonate, triallylisocyanurate, and benzyl methacrylate. This lens is considerably improved in its physical properties necessary for lens such as superficial hardness, transmittance, and adhesion strength of glass film coated on the surface, as well as having a high refractive index.Type: GrantFiled: October 26, 1981Date of Patent: February 8, 1983Assignee: Hoya Lens CorporationInventors: Niro Tarumi, Mitsuo Sugimura, Shigeo Komiya, Makoto Tsuchiya
-
Patent number: 4329378Abstract: Plastic eyeglass lenses and the like are marked with an identifying character or symbol by applying to the surface thereof or dissolving or comelting therein a flourescent dyestuff according to the disclosed method. When the proper amount of flourescent dyestuff is included the lens appears normal in sunlight but is characteristically marked in whole or in part under ultraviolet light depending on the area treated.Type: GrantFiled: December 11, 1979Date of Patent: May 11, 1982Assignee: Kabushiki Kaisha Hoya Lens (Hoya Lens Corporation)Inventors: Niro Tarumi, Makoto Tsuchiya, Kunio Sasaki
-
Patent number: 4306780Abstract: The present invention relates to a copolymer for high refractive lens having a refractive index equal to or higher than 1.55, obtained by copolymerization of one or more of the first monomer component having the formula (I) ##STR1## wherein R.sub.1 signifies hydrogen atom or methyl radical, R.sub.2 signifies hydrogen atom or methyl radical, and m and n signify integers 0 to 4 in total, with one or more of the radically polymerizable second monomer component, homo-polymer of which has a refractive index equal to or higher than 1.55 and, if necessary, with the radically polymerizable third monomer component, the homo-polymer of which has a refractive index lower than 1.55 and to the lens prepared from said copolymer.Type: GrantFiled: July 13, 1979Date of Patent: December 22, 1981Assignee: Hoya Lens CorporationInventors: Niro Tarumi, Makoto Tsuchiya, Shigeo Komiya, Eiichi Masuhara
-
Patent number: 4143017Abstract: A soft contact lens having a water content of 20 to 45% and a tensile strength of at least 500 g/mm.sup.2 can be produced by pouring into a mold a composition comprising 70 to 90% by weight of an alkylene glycol monomethacrylate, 0 to 2% by weight of a polyfunctional monomer as a crosslinking agent, 0 to 5% by weight of an unsaturated carboxylic acid containing at least one carboxyl group in its molecule, 2 to 25% by weight of a methacrylic acid ester and 0 to 10% by weight of a vinyl monomer such as vinyl acetate, effecting polymerization of the composition, processing the resulting polymer into a lens, and then hydrating and swelling the lens thus obtained.Type: GrantFiled: February 25, 1977Date of Patent: March 6, 1979Assignee: Hoya Lens CorporationInventors: Niro Tarumi, Makoto Tuchiya
-
Patent number: 3988274Abstract: A soft contact lens having a water content of at least 45% and a tensile strength of at least 100 g/mm.sup.2 can be produced by pouring into a mold a composition consisting of 70 to 93% by weight of an alkylene glycol monoacrylate or monomethacrylate, 0.3 to 2.0% by weight of a polyfunctional monomer, 1 to 10% by weight of a monomer having at least one carboxyl group in its molecule and 5 to 20% by weight of an acrylic or methacrylic acid derivative, raising the temperature of the composition from 35.degree. C to 110.degree. C continuously to effect polymerization, processing the resulting formed product into a lens, and then swelling the lens thus obtained by hydration treatment including alkali treatment.Type: GrantFiled: February 6, 1975Date of Patent: October 26, 1976Assignee: Hoya Lens Co., Ltd.Inventors: Eiichi Masuhara, Niro Tarumi, Makoto Tsuchiya