Patent Inventor: Teruyuki Nagata

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Halogenating agents
Inventor: Sonoda, et al. | Patent Number: 6632949

Nitrogen-based halogenating agents and process for preparing halogen-containing compounds
Inventor: Sonoda, et al. | Patent Number: 6458990

Fluorination agent and preparation and use of same
Inventor: Hayashi, et al. | Patent Number: 6417361

Nitrogen-based halogenating agents and process for preparing halogen-containing compounds
Inventor: Sonoda, et al. | Patent Number: 6329529

Tetraalkylfluoroformamidinium trifluoroacetate and preparation process of same
Inventor: Hayashi, et al. | Patent Number: 6222046

Process for preparing acetylene derivative from a ketone compound
Inventor: Sonoda, et al. | Patent Number: 6127583

Sulfur-containing urethane-based resin and composition and process for producing the resin
Inventor: Okazaki, et al. | Patent Number: 6100362

Polysulfide-based resin composition, polysulfide-based resin, and optical material comprising the resin
Inventor: Okazaki, et al. | Patent Number: 5955206

High purity 1,3-dialkyl-2-imidazolidinone and preparation process of same
Inventor: Mizuta, et al. | Patent Number: 5872260

Process for preparing a sulfur-containing urethane-based plastic lens and the lens prepared thereby
Inventor: Okazaki, et al. | Patent Number: 5837797

$Plastic lenses having a high-refractive index, process for the preparation thereof and casting polymerization process for preparing sulfur-containing urethane resin lens and lens prepared thereby$

Plastic lenses having a high-refractive index, process for the preparation thereof and casting polymerization process for preparing sulfur-containing urethane resin lens and lens prepared thereby
Inventor: Nagata, et al. | Patent Number: 5753730

Preparation process of acyl halide or sulfonyl halide
Inventor: Nagata, et al. | Patent Number: 5750779

Sulfur-containing urethane-based resin composition, its resin, and optical element and lens comprising resin
Inventor: Irizato, et al. | Patent Number: 5736609

Process for preparing polycondensation polymer compound
Inventor: Tamai, et al. | Patent Number: 5719256

Composition for urethane-base plastic lens, urethane-base plastic lens obtained from the composition, and process for the production of the plastic lens
Inventor: Okazaki, et al. | Patent Number: 5693738

Process for producing alkoxy-substituted triphenylamines
Inventor: Kikuchi, et al. | Patent Number: 5654483

Color-developing agents and color-developing sheets
Inventor: Nishimura, et al. | Patent Number: 5647896

Method for preparing aromatic secondary amino compound
Inventor: Nagata, et al. | Patent Number: 5618980

Process for preparing high-purity aniline
Inventor: Nagata, et al. | Patent Number: 5616806

Polythiol useful for preparing sulfur-containing urethane-based resin and process for producing the same
Inventor: Okazaki, et al. | Patent Number: 5608115

Process for producing 1,3-dialkyl-2-imidazolidinone
Inventor: Naruse, et al. | Patent Number: 5594149

$Plastic lenses having a high-refractive index, process for the preparation thereof and casting polymerization process for preparing sulfur containing urethane resin lens and lens prepared thereby$

Plastic lenses having a high-refractive index, process for the preparation thereof and casting polymerization process for preparing sulfur containing urethane resin lens and lens prepared thereby
Inventor: Nagata, et al. | Patent Number: 5594088

Process for producing 1,3-dialkyl-2-imidazolidinone
Inventor: Naruse, et al. | Patent Number: 5583256

Process for the preparation of diphenylamine or nucleus-substituted derivative thereof
Inventor: Nagata, et al. | Patent Number: 5545752

Process for the preparation of 4-methoxy-2,2',6'-Trimethyldiphenylamine
Inventor: Kusuda, et al. | Patent Number: 5545751

Method for preparing aromatic secondary amino compound
Inventor: Nagata, et al. | Patent Number: 5536878

Process for the preparation of aliphatic polyisocyanates
Inventor: Okazaki, et al. | Patent Number: 5523467

1,3,6-trialkylhexahydro-1,3,6-triazocine-2-on and preparation process thereof
Inventor: Naruse, et al. | Patent Number: 5514793

Process for the preparation of diphenylamine
Inventor: Kusuda, et al. | Patent Number: 5449829

Sulfur-containing acid phosphoric ester internal release agent
Inventor: Kusumoto, et al. | Patent Number: 5389708

Method for preparing aromatic secondary amino compound
Inventor: Nagata, et al. | Patent Number: 5382690

Method for extracting an amino acid ester from a hydrous solution of a mineral acid salt thereof
Inventor: Kamashita, et al. | Patent Number: 5374765

Stabilizing method of isocyanate compounds and isocyanate compositions stabilized thereby
Inventor: Nagata, et al. | Patent Number: 5302749

Preparation of bis(3-nitrophenoxy) compound
Inventor: Kase, et al. | Patent Number: 5296635

Process for preparing high-purity aniline
Inventor: Nagata, et al. | Patent Number: 5283365

Optical urethane resins and plastic lenses comprising the same
Inventor: Okazaki, et al. | Patent Number: 5194559

Preparation process of aliphatic isocyanate
Inventor: Nagata, et al. | Patent Number: 5136086

$Highly-refractive plastic lens and process for making the lens$

Highly-refractive plastic lens and process for making the lens
Inventor: Nagata, et al. | Patent Number: 5126388

$Resin having a large refractive index, lenses comprising the resin and process for preparing the lens$

Resin having a large refractive index, lenses comprising the resin and process for preparing the lens
Inventor: Nagata, et al. | Patent Number: 5084545

$Resin for plastic lens having high-refractive index, lens comprising the resin, and method for preparation of the lens$

Resin for plastic lens having high-refractive index, lens comprising the resin, and method for preparation of the lens
Inventor: Nagata, et al. | Patent Number: 5021503

$Process for molding a highly-refractive plastic lens$

Process for molding a highly-refractive plastic lens
Inventor: Nagata, et al. | Patent Number: 5013496

Process for producing aminobenzylamine
Inventor: Nagata, et al. | Patent Number: 4978792

Preparation process of N-substituted monochlorosuccinimides
Inventor: Matsukawa, et al. | Patent Number: 4970323

Process for producing diphenylamines or N,N'-diphenyl-phenylenediamines
Inventor: Nagata, et al. | Patent Number: 4952731

S-alkyl thiocarbamate base resin, plastic lens comprising the resin, and process for making the lens
Inventor: Nagata, et al. | Patent Number: 4946923

Preparation process of 4,4'-biphenol, precursor of same and preparation process of precursor
Inventor: Miura, et al. | Patent Number: 4939306

Polyurethane base lens resin, plastic lens comprising the resin and preparation method of the lens
Inventor: Nagata, et al. | Patent Number: 4929707

Process for producing cyclic ureas
Inventor: Kajimoto, et al. | Patent Number: 4918186

Process for producing cyclic ureas
Inventor: Kajimoto, et al. | Patent Number: 4900820

Preparation process of 4-(4-hydroxyphenyl)-cyclohexanol
Inventor: Miura, et al. | Patent Number: 4894487

Preparation process of 4,4'-biphenol, precursor of same and preparation process of precursor
Inventor: Miura, et al. | Patent Number: 4877907

Preparation process of 4,4'-biphenol, precursor of same and preparation process of precursor
Inventor: Miura, et al. | Patent Number: 4873374

Process for producing diphenylamines or N,N'-diphenylphenylenediamines
Inventor: Nagata, et al. | Patent Number: 4871875

Method of purifying 2,4-xylenol
Inventor: Miura, et al. | Patent Number: 4851590

4,4-bis(4-hydroxyphenyl)cyclohexanecarboxylic acid derivatives and process for preparing same
Inventor: Miura, et al. | Patent Number: 4814488

Process for producing diphenylamines or N,N'-diphenyl-phenylenediamines
Inventor: Nagata, et al. | Patent Number: 4804783

$High-refractivity plastic lens resin formed from a polyisocyanate and a polythiol$

High-refractivity plastic lens resin formed from a polyisocyanate and a polythiol
Inventor: Kanemura, et al. | Patent Number: 4791185

Process for preparing cyclohexanonecarboxylic acid compounds
Inventor: Miura, et al. | Patent Number: 4785132

Sulfur-containing polyurethane base lens resin
Inventor: Kajimoto, et al. | Patent Number: 4780522

$High-refractivity plastic lens resin formed by reacting at least one polyisocyanate with at least one polythiol$

High-refractivity plastic lens resin formed by reacting at least one polyisocyanate with at least one polythiol
Inventor: Kanemura, et al. | Patent Number: 4775733

Process for the preparation of 4'-hydroxybiphenyl-4-carboxyl acid
Inventor: Miura, et al. | Patent Number: 4755617

4,4-bis(4-hydroxyphenyl)cyclohexanecarboxylic acid derivatives and process for preparing same
Inventor: Miura, et al. | Patent Number: 4755616

Process for producing 1, 3-dialkyl-2-imidazolidinone
Inventor: Nagata, et al. | Patent Number: 4731453

Purification process of 3,3'-dinitrodiphenyl compounds
Inventor: Yamaguchi, et al. | Patent Number: 4724268

Process for the preparation of 4,4'-biphenol
Inventor: Nagata, et al. | Patent Number: 4723046

S-alkyl thiocarbamate base lens resin
Inventor: Kajimoto, et al. | Patent Number: 4689387

Sulfur-containing polyurethane base lens resin
Inventor: Kajimoto, et al. | Patent Number: 4680369

Process for producing 1,3-dimethyl-2-imidazolidinone
Inventor: Nagata, et al. | Patent Number: 4668793

Process for producing 4-alkoxyanilines
Inventor: Nagata, et al. | Patent Number: 4625062

Process for producing 3-phenoxybenzyl 2-(4-alkoxyphenyl)-2-methylpropyl ethers
Inventor: Umemoto, et al. | Patent Number: 4542243

Process for preparing organic isocyanates
Inventor: Yamamoto, et al. | Patent Number: 4193932

Process for purifying crude p-aminophenol
Inventor: Yamamoto, et al. | Patent Number: 4139562

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