LexDanaLexDanabeta
Inventor

Hitoshi Sawabu

Inventor
Tokyo, JP

Overview

2→
Patents
1976–1980
Patent span
Performing operations
Primary field (CPC B)

Patents· 2 as inventor

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

B01Dprimary
B01DSeparation50%
D01DMechanical methods or apparatus in the manufacture of artificial filaments, threads, fibres, bristles or ribbons25%
Y10TTechnical subjects covered by former us classification25%
PatentTitleYear
4,181,694'Method for producing hollow fibers of acrylonitrile polymers for ultrafilter'19803,933,653'Membranes of acrylonitrile polymers for ultrafilter and method for producing the same'1976

Career & activity timeline

Assembled from patent assignee/location history and declaration credentials.

1976–1980Patents assigned to ASAHI CHEMICAL IND (2)· patent assignee history
1976–1980Based in Tokyo, JP· patent location history

Inventor activity

Assignee and location history derived from the patent record.

Assignees
AssigneePatentsSpan
ASAHI CHEMICAL IND21976–1980
Locations
LocationPatentsSpan
Tokyo, JP21976–1980