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Iwao Sakaguchi

This inventor holds 5 USPTO granted patents. Top assignee: Sumitomo Chemical Company, Limited. Active years: 1982-1995.

IDiyas Innovation Intelligence. (2026). Inventor Profile: Iwao Sakaguchi. Retrieved from https://idiyas.com/inventor/iwao-sakaguchi

Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile

USPTO Granted Patents = 5

% Patents Active = 100.0

Average Co-Inventor Count = 3.3

ph-index = 3

Forward Citations = 15(Granted Patents)

Location History:

Toyonaka, JP (1982 - 1984)
Hyogo, JP (1994 - 1995)

Company Filing History:

Sumitomo Chemical Company, Limited

Years Active: 1982-1995

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5 patents (USPTO):Sort by Forward CitationsExplore Patents

1. 5416263 - Process for producing 4,4'-Diamino-1,1'-dianthraquinonyl pigments (1995-05-16),

2. 5393899 - Process for purification of crude (1995-02-28),

3. 5320678 - Process for producing 4,4'-diamino-1,1,'-dianthraquinonyl pigments (1994-06-14),

4. 4481358 - Process for producing dioxazine violet pigment (1984-11-06),

5. 4317908 - Process for producing dioxazine violet pigment (1982-03-02),

Profile summary based on public USPTO records.

Data Sources: USPTO Patent Grant XML, Patent Center, EPO & CIPO • Normalized by IDiyas Innovation Graph. Methodology & provenance architecturePlease report any incorrect information to [email protected]

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