Inventor

Wai M. Choi

Inventor

West Newton, MA, US

Overview

1983–2018

Patent span

General tagging of new technological developments

Primary field (CPC Y)

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

H01Mprimary

H01MProcesses or means, e.g. batteries, for the direct conversion of chemical energy into electrical energy19%

Y02EReduction of greenhouse gas [ghg] emissions, related to energy generation, transmission or distribution19%

Y10TTechnical subjects covered by former us classification12%

B01DSeparation11%

B32BLayered products, i.e. products built-up of strata of flat or non-flat, e.g. cellular or honeycomb, form7%

B03CMagnetic or electrostatic separation of solid materials from solid materials or fluids5%

C08JWorking-up5%

D04HMaking textile fabrics, e.g. from fibres or filamentary material5%

D06MTreatment, not provided for elsewhere in class d06, of fibres, threads, yarns, fabrics, feathers or fibrous goods made from such materials5%

B01JChemical or physical processes, e.g. catalysis or colloid chemistry2%

PatentTitleYear

Assembled from patent assignee/location history and declaration credentials.

1983–1995Patents assigned to GRACE W R & CO (5)· patent assignee history

1983–2018Based in West Newton, MA, US· patent location history

1995–1997Patents assigned to DARAMIC INC (2)· patent assignee history

1995Based in Newton, MA, US· patent location history

2002–2015Patents assigned to HOLLINGSWORTH & VOSE CO (7)· patent assignee history

2014Patents assigned to CHOI WAI M (1)· patent assignee history

2016–2018Patents assigned to ENTEGRIS INC (2)· patent assignee history

Assignee and location history derived from the patent record.

Assignees

Locations

Location	Patents	Span
West Newton, Massachusetts, US	15	1983–2018
Newton, Massachusetts, US	2	1995