Inventor
Kohur N. Subramanian
Inventor
Mississauga, CA
Overview
Patents· 13 as inventor
Public. Assignee & technology derived from the patent record. Each patent links to its LexDana page.
C22Bprimary
C22BProduction and refining of metals38%
Y02PClimate change mitigation technologies in the production or processing of goods22%
C01GCompounds containing metals not covered by subclasses c01d or c01f13%
C01BNon-metallic elements9%
Y10STechnical subjects covered by former uspc cross-reference art collections [xracs] and digests9%
C25CProcesses for the electrolytic production, recovery or refining of metals6%
C01PIndexing scheme relating to structural and physical aspects of solid inorganic compounds3%
PatentTitleYear
4,421,552'Dead roast-oxide flash reduction process for copper concentrates'19834,384,940'Chlorine leaching of nickel-cobalt-iron sulphides'19834,304,644'Autoclave oxidation leaching of sulfide materials containing copper, nickel and/or cobalt'19814,280,988'Recovery of nickel and cobalt from leach slurries'19814,272,493'Pelletizing sulfation of anode slimes'19814,229,270'Process for the recovery of metal values from anode slimes'19804,163,046'Recovery of selenium'19794,085,188'Reduction leaching of raw sea nodules with sulfides'19784,065,542'Two stage leaching of limonitic ore and sea nodules'19774,062,924'Reductive leaching of limonitic ores with hydrogen sulfide'19774,046,851'Two stage sulfuric acid leaching of sea nodules'19774,039,406'Recovering copper from concentrates with insoluble sulfate forming leach'19774,006,215'Recovering iron, nickel, or cobalt from sulfate solution'1977Career & activity timeline
Assembled from patent assignee/location history and declaration credentials.
1977–1981Patents assigned to INT NICKEL CO (10)· patent assignee history
1977Patents assigned to NORANDA MINES LTD (1)· patent assignee history
1977–1979Based in Mississauga, CA· patent location history
1980–1981Based in East Hanover, NJ, US· patent location history
1983Patents assigned to EXXON RESEARCH ENGINEERING CO (1)· patent assignee history
1983Patents assigned to INCO LTD (1)· patent assignee history
1983Based in Houston, TX, US· patent location history
Inventor activity
Assignee and location history derived from the patent record.
Assignees
| Assignee | Patents | Span |
|---|---|---|
| INT NICKEL CO | 10 | 1977–1981 |
| EXXON RESEARCH ENGINEERING CO | 1 | 1983 |
| INCO LTD | 1 | 1983 |
| NORANDA MINES LTD | 1 | 1977 |
Locations
| Location | Patents | Span |
|---|---|---|
| Mississauga, CA | 7 | 1977–1979 |
| East Hanover, New Jersey, US | 4 | 1980–1981 |
| Houston, Texas, US | 2 | 1983 |