Inventor
Kwok K. Sun
Inventor
Hamden, CT, US
Overview
Patents· 13 as inventor
Public. Assignee & technology derived from the patent record. Each patent links to its LexDana page.
C07Cprimary
C07CAcyclic or carbocyclic compounds42%
C08GMacromolecular compounds obtained otherwise than by reactions only involving unsaturated carbon-to-carbon bonds26%
A41DOuterwear5%
B32BLayered products, i.e. products built-up of strata of flat or non-flat, e.g. cellular or honeycomb, form5%
C07DHeterocyclic compounds5%
C09JAdhesives5%
Y10STechnical subjects covered by former uspc cross-reference art collections [xracs] and digests5%
Y10TTechnical subjects covered by former us classification5%
PatentTitleYear
5,418,054'Flame-retardant, waterproof and breathable expanded PTFE laminate'19954,868,225'Novel product'19894,866,208'Meta-phenylene diamine derivatives'19894,792,623'Meta-phenylene-diamines'19884,607,093'Sydnone based polyimide'19864,351,957'Process for preparing diaminodiphenyl-alkanes'19824,201,722'Process for separating 4,4\'-diaminodiphenylmethane'19804,177,211'Process for the preparation of bis(aminophenyl)alkanes'19794,052,466'Process for the preparation of bisphenol-A'19774,034,039'Purification of methylenedianilines'19774,029,705'Purification process for MDA'19774,028,361'Process for the purification of MDA'19774,008,275'Process for isolating 4,4\'-diaminodiphenylmethane'1977Career & activity timeline
Assembled from patent assignee/location history and declaration credentials.
1977–1982Patents assigned to UPJOHN CO (8)· patent assignee history
1977–1982Based in Hamden, CT, US· patent location history
1986–1989Patents assigned to DOW CHEMICAL CO (4)· patent assignee history
1986–1989Based in North Haven, CT, US· patent location history
1995Patents assigned to GORE & ASS (1)· patent assignee history
1995Based in Elkton, MD, US· patent location history
Inventor activity
Assignee and location history derived from the patent record.
Assignees
| Assignee | Patents | Span |
|---|---|---|
| UPJOHN CO | 8 | 1977–1982 |
| DOW CHEMICAL CO | 4 | 1986–1989 |
| GORE & ASS | 1 | 1995 |
Locations
| Location | Patents | Span |
|---|---|---|
| Hamden, CT, US | 8 | 1977–1982 |
| North Haven, CT, US | 4 | 1986–1989 |
| Elkton, Maryland, US | 1 | 1995 |