Inventor

William A. Heeschen

Inventor

Midland, MI, US

Overview

7→

Patents

1994–2019

Patent span

Performing operations

Primary field (CPC B)

Patents· 7 as inventor

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

G01Nprimary

G01NInvestigating or analysing materials by determining their chemical or physical properties25%

B24BMachines, devices, or processes for grinding or polishing15%

B01DSeparation5%

B24DTools for grinding, buffing or sharpening5%

B26DCutting5%

B29CShaping or joining of plastics5%

B29KIndexing scheme associated with subclasses b29b, b29c or b29d, relating to moulding materials or to materials for moulds, reinforcements, fillers or preformed parts, e.g. inserts5%

B29LIndexing scheme associated with subclass b29c, relating to particular articles5%

C08FMacromolecular compounds obtained by reactions only involving carbon-to-carbon unsaturated bonds5%

C08JWorking-up5%

PatentTitleYear

10,272,541Polishing layer analyzer and method2019 9,770,808'Method of manufacturing chemical mechanical polishing pads'2017 9,737,971'Chemical mechanical polishing pad, polishing layer analyzer and method'2017 8,875,562'Filter and membrane defect detection system'2014 8,324,287'Positive skew styrene-acrylonitrile copolymer foam'2012 7,843,560'Stable turbidity calibration standards'2010 5,311,283'Fiber optic probe and method for detecting optically active materials'1994

Career & activity timeline

Assembled from patent assignee/location history and declaration credentials.

1994Patents assigned to DOW CHEMICAL CO (1)· patent assignee history

1994–2019Based in Midland, MI, US· patent location history

2012–2019Patents assigned to DOW GLOBAL TECHNOLOGIES LLC (5)· patent assignee history

2012–2014Patents assigned to HEESCHEN WILLIAM A (2)· patent assignee history

2012Patents assigned to COSTEUX STEPHANE (1)· patent assignee history

2017–2019Patents assigned to ROHM & HAAS ELECT MATERIALS CMP HOLDINGS INC (3)· patent assignee history

Inventor activity

Assignee and location history derived from the patent record.

Assignees

Assignee	Patents	Span
DOW GLOBAL TECHNOLOGIES LLC	5	2012–2019
ROHM & HAAS ELECT MATERIALS CMP HOLDINGS INC	3	2017–2019
HEESCHEN WILLIAM Aself	2	2012–2014
COSTEUX STEPHANE	1	2012
DOW CHEMICAL CO	1	1994

Locations

Location	Patents	Span
Midland, MI, US	7	1994–2019