Inventor

Cha P. Doh

Inventor

Sudbury, MA, US

Overview

2003–2021

Patent span

Performing operations

Primary field (CPC B)

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

B01Dprimary

B01DSeparation26%

B29CShaping or joining of plastics7%

B29LIndexing scheme associated with subclass b29c, relating to particular articles7%

C02FTreatment of water, waste water, sewage, or sludge7%

F28DHeat-exchange apparatus, not provided for in another subclass, in which the heat-exchange media do not come into direct contact7%

F28FDetails of heat-exchange and heat-transfer apparatus, of general application7%

G03FPhotomechanical production of textured or patterned surfaces, e.g. for printing, for processing of semiconductor devices7%

Y02PClimate change mitigation technologies in the production or processing of goods7%

Y10STechnical subjects covered by former uspc cross-reference art collections [xracs] and digests7%

Y10TTechnical subjects covered by former us classification7%

PatentTitleYear

Assembled from patent assignee/location history and declaration credentials.

2003–2004Patents assigned to MYKROLIS CORP (3)· patent assignee history

2003–2021Based in Sudbury, MA, US· patent location history

2007–2021Patents assigned to ENTEGRIS INC (4)· patent assignee history

2012Patents assigned to BRIGGS LAFORGE ALICIA (1)· patent assignee history

2012Patents assigned to CHENG KWOK-SHUN (1)· patent assignee history

2012Patents assigned to DOH CHA P (1)· patent assignee history

Assignee and location history derived from the patent record.

Assignees

Locations

Location	Patents	Span
Sudbury, Massachusetts, US	7	2003–2021