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Inventor

Ralph Cheek

Inventor
Los Altos Hills, CA, US

Overview

2→
Patents
1990–1999
Patent span
Performing operations
Primary field (CPC B)

Patents· 2 as inventor

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

C22Bprimary
C22BProduction and refining of metals25%
Y02PClimate change mitigation technologies in the production or processing of goods25%
B03BSeparating solid materials using liquids or using pneumatic tables or jigs13%
B03CMagnetic or electrostatic separation of solid materials from solid materials or fluids13%
B07BSeparating solids from solids by sieving, screening, sifting or by using gas currents13%
C25CProcesses for the electrolytic production, recovery or refining of metals13%
PatentTitleYear
5,901,910'Metal recovery from salt cake and other compositions'19994,927,459'Treatment of aluminum reduction cell linings combined with use in aluminum scrap reclamation'1990

Career & activity timeline

Assembled from patent assignee/location history and declaration credentials.

1990–1999Patents assigned to IMCO RECYCLING INC (2)· patent assignee history
1990Based in Tulsa, OK, US· patent location history
1999Based in Los Altos Hills, CA, US· patent location history

Inventor activity

Assignee and location history derived from the patent record.

Assignees
AssigneePatentsSpan
IMCO RECYCLING INC21990–1999
Locations
LocationPatentsSpan
Los Altos Hills, California, US11999
Tulsa, OK, US11990