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Inventor

Shigehiko Yoshioka

Inventor
Akashi, JP

Overview

7→
Patents
1980–1989
Patent span
Textiles
Primary field (CPC D)

Patents· 7 as inventor

Public. Assignee & technology derived from the patent record. Each patent links to its LexDana page.

D21Hprimary
D21HPulp compositions54%
C07CAcyclic or carbocyclic compounds15%
C09KMaterials for miscellaneous applications, not provided for elsewhere15%
C08FMacromolecular compounds obtained by reactions only involving carbon-to-carbon unsaturated bonds8%
Y10TTechnical subjects covered by former us classification8%
PatentTitleYear
4,882,087'Aqueous dispersed solution of substituted succinic anhydride and process for producing the same'19894,849,055'Process for making paper using a substituted succinic anhydride as a sizing agent'19894,810,301'Composition for sizing agent and process for using the same composition'19894,717,452'Composition for sizing agent and process for using the same composition'19884,533,434'Process for sizing paper and process for making plasterboard base paper sized thereby'19854,405,408'Cellulose processing agents and paper processed therewith'19834,200,562'Sizing agent for use in making paper'1980

Career & activity timeline

Assembled from patent assignee/location history and declaration credentials.

1980–1989Patents assigned to SEIKO KAGAKU KOGYO CO LTD (7)· patent assignee history
1980–1989Based in Akashi, JP· patent location history
1985Based in Hyogo, JP· patent location history
1988–1989Patents assigned to HOKUETSU PAPER MILLS (3)· patent assignee history
1988–1989Patents assigned to NIPPON OIL CO LTD (3)· patent assignee history
1989Patents assigned to HOKUETSO PAPER MILLS LTD (1)· patent assignee history
1989Patents assigned to NIPPON CO LTD (1)· patent assignee history

Inventor activity

Assignee and location history derived from the patent record.

Assignees
AssigneePatentsSpan
SEIKO KAGAKU KOGYO CO LTD71980–1989
HOKUETSU PAPER MILLS31988–1989
NIPPON OIL CO LTD31988–1989
HOKUETSO PAPER MILLS LTD11989
NIPPON CO LTD11989
Locations
LocationPatentsSpan
Akashi, JP61980–1989
Hyogo, JP11985