Inventor
Yoshifumi Kawakatsu
Inventor
Shizuoka, JP
Overview
Patents· 4 as inventor
Public. Assignee & technology derived from the patent record. Each patent links to its LexDana page.
D01Fprimary
D01FChemical features in the manufacture of artificial filaments, threads, fibres, bristles or ribbons50%
Y10TTechnical subjects covered by former us classification33%
C07CAcyclic or carbocyclic compounds17%
PatentTitleYear
4,898,700'Process for producing preoxidized fibers from acrylic fibers'19904,659,623'Acrylic fibers for producing preoxidized fibers'19874,522,801'Process for producing carbon fiber or graphite fiber'19854,026,926'Process for the preparation of methallyl sulfonic acid and its salts'1977Career & activity timeline
Assembled from patent assignee/location history and declaration credentials.
1977–1987Patents assigned to TOHO BESLON CO (3)· patent assignee history
1977–1990Based in Shizuoka, JP· patent location history
1990Patents assigned to TOHO RAYON KK (1)· patent assignee history
Inventor activity
Assignee and location history derived from the patent record.
Assignees
| Assignee | Patents | Span |
|---|---|---|
| TOHO BESLON CO | 3 | 1977–1987 |
| TOHO RAYON KK | 1 | 1990 |
Locations
| Location | Patents | Span |
|---|---|---|
| Shizuoka, JP | 4 | 1977–1990 |