Inventor
Michael E. Chalkley
Inventor
St. Albert, CA
Overview
Patents· 7 as inventor
Public. Assignee & technology derived from the patent record. Each patent links to its LexDana page.
C22Bprimary
C22BProduction and refining of metals29%
Y02PClimate change mitigation technologies in the production or processing of goods29%
C01BNon-metallic elements14%
B03DFlotation7%
C01GCompounds containing metals not covered by subclasses c01d or c01f7%
G06QInformation and communication technology [ict] specially adapted for administrative, commercial, financial, managerial or supervisory purposes7%
H04LTransmission of digital information, e.g. telegraphic communication7%
PatentTitleYear
10,931,438Generating a representative article20215,711,929'Purification of elemental sulphur'19985,403,571'Purification of elemental sulphur'19955,380,354'Recovery of metals from sulphidic material'19955,348,713'Recovery of metal values from zinc plant residues'19944,594,102'Recovery of cobalt and nickel from sulphidic material'19864,545,963'Process for separately recovering zinc and lead values from zinc and lead containing sulphidic ore'1985Career & activity timeline
Assembled from patent assignee/location history and declaration credentials.
1985–1986Patents assigned to SHERRITT GORDON MINES LTD (2)· patent assignee history
1985–1998Based in St. Albert, CA· patent location history
1994–1995Patents assigned to SHERRITT GORDON LTD (2)· patent assignee history
1995Patents assigned to SHERRITT INC (1)· patent assignee history
1998Patents assigned to 698638 ALBERTA LTD (1)· patent assignee history
2021Patents assigned to IBM (1)· patent assignee history
2021Based in Dunshaughlin, IE· patent location history
Inventor activity
Assignee and location history derived from the patent record.
Assignees
| Assignee | Patents | Span |
|---|---|---|
| SHERRITT GORDON LTD | 2 | 1994–1995 |
| SHERRITT GORDON MINES LTD | 2 | 1985–1986 |
| 698638 ALBERTA LTD | 1 | 1998 |
| IBM | 1 | 2021 |
| SHERRITT INC | 1 | 1995 |
Locations
| Location | Patents | Span |
|---|---|---|
| St. Albert, CA | 6 | 1985–1998 |
| Dunshaughlin, IE | 1 | 2021 |