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Inventor

Yunn H. Chiang

Inventor
Andover, MA, US

Overview

8→
Patents
1976–1995
Patent span
Chemistry
Primary field (CPC C)

Patents· 8 as inventor

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

B41Mprimary
B41MPrinting, duplicating, marking, or copying processes14%
C07CAcyclic or carbocyclic compounds14%
G03CPhotosensitive materials for photographic purposes14%
Y10STechnical subjects covered by former uspc cross-reference art collections [xracs] and digests14%
Y10TTechnical subjects covered by former us classification14%
B42DBooks7%
C07DHeterocyclic compounds7%
C09BOrganic dyes or closely-related compounds for producing dyes, e.g. pigments7%
C09KMaterials for miscellaneous applications, not provided for elsewhere7%
PatentTitleYear
5,380,695'Image-receiving element for thermal dye transfer method'19955,141,669'Liquid crystal compounds having chiral ester head groups'19925,024,989'Process and materials for thermal imaging'19914,405,781'Method for preparing salts of 6-chloropurine'19834,195,038'Preparation of 3-bromo-2-hydroxy-4,4,5,5-tetramethylcyclopenta-2-enone'19804,180,513'Method for synthesizing acid blue 104'19793,983,137'Process for preparing 3-(indol-3-yl)-dehydronaphthalide hydrochlorides'19763,933,854'3-(Indol-3-yl)dehydronaphthalide hydrochlorides'1976

Career & activity timeline

Assembled from patent assignee/location history and declaration credentials.

1976–1995Patents assigned to POLAROID CORP (8)· patent assignee history
1976Based in Woburn, MA, US· patent location history
1979–1995Based in Andover, MA, US· patent location history

Inventor activity

Assignee and location history derived from the patent record.

Assignees
AssigneePatentsSpan
POLAROID CORP81976–1995
Locations
LocationPatentsSpan
Andover, Massachusetts, US61979–1995
Woburn, Massachusetts, US21976