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For the Inventor, By the Inventor

Kanagawa, Japan

Noboru Sayo

USPTO Granted Patents = 50 

 

Average Co-Inventor Count = 3.8

ph-index = 11

Forward Citations = 324(Granted Patents)

Forward Citations (Not Self Cited) = 299(Dec 10, 2025)


Inventors with similar research interests:


Location History:

  • Tokyo, JP (1990 - 1995)
  • Hiratsuka, JP (1996 - 2011)
  • Kanagawa, JP (1988 - 2013)

Company Filing History:

goldMedal47 out of 508 
 
Takasago International Corporation
 patents
silverMedal3 out of 47 
 
Takasago Perfumery Co., Ltd.
 patents

Years Active: 1988-2013

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Areas of Expertise:
Ruthenium Complexes
Optically Active Alcohols
Phosphine Derivatives
Asymmetric Hydrogenation
Chiral Ligands
Transition Metal Complexes
Optically Active Carboxylic Acids
Dihydropyran Derivatives
Diphosphine Compounds
Optically Active .Beta.-Lactones
Optically Active .Gamma.-Butyrolactones
Optically Active 1-Substituted-1,3-Propanediols
50 patents (USPTO):Explore Patents
1. 8431709 - Acylation reaction of hydroxyl group (2013-04-30),
2. 7964744 - Method for producing a ruthenium complex (2011-06-21),
3. 7754889 - Optically active transition metal-diamine compound and process for producing optically active alcohol with the same (2010-07-13),
4. 7294601 - Phosphines, transition metal complexes containing the same as the ligand, and process for production of optically active carboxylic acids (2007-11-13),
5. 6596887 - Process for producing an optically active ruthenium-phosphine complex and process for producing an optically active alcohol by using the complex (2003-07-22),
6. 6492545 - Process for producing optically active alcohol (2002-12-10),
7. 6472539 - Production process of diphosphine oxide and diphosphonate (2002-10-29),
8. 6465594 - Phosphine derivative and polymer thereof and transition metal complex comprising the same (2002-10-15),
9. 6342644 - Method for producing 1-menthol (2002-01-29),
10. 6333291 - Optically active diphosphine compound, production intermediate thereof, transition metal complex containing the compound as ligand and asymmetric hydrogenation catalyst containing the complex (2001-12-25),
11. 6313317 - Ruthenium-phosphine complex and method for producing the same (2001-11-06),
12. 6040465 - Process for producing optically active .beta.-lactones (2000-03-21),
13. 5922918 - Method for making an optically active diphosphine ligand (1999-07-13),
14. 5919962 - Process for preparing ruthenium-phosphine complex (1999-07-06),
15. 5847222 - Optically active diphosphine compound, method for making the compound, (1998-12-08),

Title: Innovator Profile: Noboru Sayo

Introduction: Noboru Sayo is a prominent inventor based in Kanagawa, Japan. With an impressive portfolio of 50 patents, he has made significant contributions to the field of chemical processes and production methods. His work demonstrates a commitment to not only innovation but also to environmental sustainability and efficiency.

Latest Patents: Among Noboru Sayo's latest patents is a process for the acylation reaction of a hydroxyl group. This patent discloses a selective ester production process that operates under chemically mild conditions, ensuring adequate environmental suitability, operability, and economical efficiency. The method involves reacting an alcohol with a carboxylic acid ester compound in the presence of a zinc-containing compound, allowing for the selective acylation of the alcohol's hydroxyl group.

Additionally, he has developed a method for producing a ruthenium complex. This patent outlines a process where a specific ruthenium compound is reacted with a carboxylate salt, leading to the formation of a complex vital for various advanced chemical applications.

Career Highlights: Throughout his career, Noboru Sayo has worked with notable companies such as Takasago International Corporation and Takasago Perfumery Co., Ltd. His involvement in these organizations has provided him with a strong foundation in the chemical industry, enabling him to refine his innovative approaches.

Collaborations: Noboru Sayo has collaborated with esteemed professionals like Hidenori Kumobayashi and Hidemasa Takaya. These partnerships have fostered an environment of shared knowledge and further inspired cutting-edge advancements in their respective fields.

Conclusion: Noboru Sayo's contributions to chemical invention reflect his dedication to improving production processes while considering environmental impacts. With a robust patent portfolio and collaborative spirit, he continues to drive innovation within the industry, leaving a significant mark on the future of chemical processes.

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