Inventor

Kenneth R. Butcher

Inventor
Hendersonville, NC, US

Overview

19→
Patents
1989–2010
Patent span
Chemistry
Primary field (CPC C)

Patents· 19 as inventor

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

C04Bprimary
C04BLime, magnesia19%
Y10TTechnical subjects covered by former us classification14%
B01DSeparation12%
C22BProduction and refining of metals5%
C25CProcesses for the electrolytic production, recovery or refining of metals5%
H01RElectrically-conductive connections5%
Y10STechnical subjects covered by former uspc cross-reference art collections [xracs] and digests5%
B01JChemical or physical processes, e.g. catalysis or colloid chemistry2%
B24DTools for grinding, buffing or sharpening2%
B28BShaping clay or other ceramic compositions2%

Career & activity timeline

Assembled from patent assignee/location history and declaration credentials.

1989–1993Patents assigned to NORTON CO (4)· patent assignee history
1989Based in Kent, OH, US· patent location history
1990–1991Patents assigned to ALUSUISSE (2)· patent assignee history
1990–2010Based in Hendersonville, NC, US· patent location history
1995–2000Patents assigned to SELEE CORP (4)· patent assignee history
2001–2005Patents assigned to PORVAIR CORP (4)· patent assignee history
2005–2008Patents assigned to ALCOA INC (2)· patent assignee history

Inventor activity

Assignee and location history derived from the patent record.

Assignees
AssigneePatentsSpan
NORTON CO41989–1993
PORVAIR CORP42001–2005
SELEE CORP41995–2000
ALCOA INC22005–2008
ALUSUISSE21990–1991
Locations
LocationPatentsSpan
Hendersonville, NC, US181990–2010
Kent, OH, US11989