LexDanaLexDanabeta
Inventor

Charles N. Johnson

Inventor
Racine, WI, US

Overview

4→
Patents
1992–2019
Patent span
Performing operations
Primary field (CPC B)

Patents· 4 as inventor

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

B01Dprimary
B01DSeparation15%
Y10TTechnical subjects covered by former us classification15%
B05BSpraying apparatus8%
C10GCracking hydrocarbon oils8%
C10MLubricating compositions8%
C10NIndexing scheme associated with subclass c10m relating to lubricating compositions8%
F15BSystems acting by means of fluids in general8%
F16KValves8%
H01BCables8%
H01HElectric switches8%
PatentTitleYear
10,256,008Electrical apparatus for the generation, transmission, distribution and/or usage of electrical energy and method for recovering a substance from an insulation medium of such an apparatus20197,846,342'Hydraulic fluid dehydration system and method including pre-heating'20105,158,235'Turbulence-quelling fluid-flow controller and method'19925,129,420'Cut-off valve'1992

Career & activity timeline

Assembled from patent assignee/location history and declaration credentials.

1992Patents assigned to ELWOOD HYDRAULICS COMPANY INC (2)· patent assignee history
1992–2010Based in Racine, WI, US· patent location history
2010Patents assigned to PUTZMEISTER AMERICA INC (1)· patent assignee history
2019Patents assigned to ABB SCHWEIZ AG (1)· patent assignee history
2019Based in Wytheville, VA, US· patent location history

Inventor activity

Assignee and location history derived from the patent record.

Assignees
AssigneePatentsSpan
ELWOOD HYDRAULICS COMPANY INC21992
ABB SCHWEIZ AG12019
PUTZMEISTER AMERICA INC12010
Locations
LocationPatentsSpan
Racine, WI, US31992–2010
Wytheville, Virginia, US12019