Inventor

Lewis Erwin

Inventor

Winnetka, IL, US

Overview

9→

Patents

1979–1992

Patent span

Performing operations

Primary field (CPC B)

Patents· 9 as inventor

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

B01Fprimary

B01FMixing, e.g. dissolving, emulsifying or dispersing14%

B01JChemical or physical processes, e.g. catalysis or colloid chemistry10%

B29CShaping or joining of plastics10%

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. inserts10%

Y10STechnical subjects covered by former uspc cross-reference art collections [xracs] and digests10%

B30BPresses in general5%

C08CTreatment or chemical modification of rubbers5%

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

C08JWorking-up5%

C08LCompositions of macromolecular compounds5%

PatentTitleYear

5,114,907'Cryogenic fluid level sensor'1992 4,855,018'Process for etching polytetrafluoroethylene'1989 4,758,398'Method of manufacture preforms'1988 4,674,885'Mixing liquids of different viscosity'1987 4,513,116'Process for the manufacture of halogenated polymers'1985 4,509,360'On-line measurement of fluid mixtures'1985 4,268,465'Method of accelerating the cooling of polymeric articles'1981 4,175,871'Fluid mixing apparatus'1979 4,174,907'Fluid mixing apparatus'1979

Career & activity timeline

Assembled from patent assignee/location history and declaration credentials.

1979–1989Patents assigned to MASSACHUSETTS INST TECHNOLOGY (6)· patent assignee history

1979–1981Based in Belmont, MA, US· patent location history

1985Patents assigned to EXXON RESEARCH ENGINEERING CO (1)· patent assignee history

1985–1987Based in Winchester, MA, US· patent location history

1988Patents assigned to DEXTER CORP (1)· patent assignee history

1988–1992Based in Winnetka, IL, US· patent location history

1992Patents assigned to ILLINOIS SUPERCONDUCTOR CORP (1)· patent assignee history

Inventor activity

Assignee and location history derived from the patent record.

Assignees

Assignee	Patents	Span
MASSACHUSETTS INST TECHNOLOGY	6	1979–1989
DEXTER CORP	1	1988
EXXON RESEARCH ENGINEERING CO	1	1985
ILLINOIS SUPERCONDUCTOR CORP	1	1992

Locations

Location	Patents	Span
Winnetka, Illinois, US	3	1988–1992
Winchester, Massachusetts, US	3	1985–1987
Belmont, Massachusetts, US	3	1979–1981