Inventor
Roger J. Wedlake
Inventor
Johannesburg, ZA
Overview
13→
Patents
1977–1998
Patent span
General tagging of new technological developments
Primary field (CPC Y)
Patents· 13 as inventor
Public. Assignee & technology derived from the patent record. Each patent links to its LexDana page.
H01Mprimary
H01MProcesses or means, e.g. batteries, for the direct conversion of chemical energy into electrical energy23%
Y02EReduction of greenhouse gas [ghg] emissions, related to energy generation, transmission or distribution23%
Y02PClimate change mitigation technologies in the production or processing of goods10%
C01BNon-metallic elements8%
C01PIndexing scheme relating to structural and physical aspects of solid inorganic compounds5%
A62CFire-fighting3%
B01JChemical or physical processes, e.g. catalysis or colloid chemistry3%
B28BShaping clay or other ceramic compositions3%
B60LPropulsion of electrically-propelled vehicles3%
C01GCompounds containing metals not covered by subclasses c01d or c01f3%
PatentTitleYear
5,716,731'Electrochemical cell'19985,607,787'High temperature storage battery'19975,224,986'Procss for the recovery of titanium values'19935,139,897'Electrochemical cell'19925,061,580'Electrochemical cell'19914,975,344'Electrochemical cell'19904,846,943'Manufacture of an alkali metal aluminum halide compound and alkali metal'19894,797,333'Electrochemical cell'19894,707,420'Power storage battery'19874,585,712'Battery comprising high temperature rechargeable electrochemical cells and support means'19864,269,905'Electrochemical cell and the protection of an electrochemical cell'19814,187,083'Hard materials of BCN in tetrahedral form and method of making it'19804,005,180'Method for producing synthetic diamonds'1977Career & activity timeline
Assembled from patent assignee/location history and declaration credentials.
1977Patents assigned to DE BEERS IND DIAMOND (1)· patent assignee history
1977–1998Based in Johannesburg, ZA· patent location history
1980–1993Patents assigned to WEDLAKE ROGER J (2)· patent assignee history
1980Based in Rembrandt Park, Johannesburg, Transvaal, ZA· patent location history
1981–1987Patents assigned to SOUTH AFRICAN INVENTIONS (2)· patent assignee history
1986–1992Patents assigned to LILLIWYTE SA (6)· patent assignee history
1992–1997Based in Mulbarton, ZA· patent location history
1993Patents assigned to BAXTER RODNEY C (1)· patent assignee history
Inventor activity
Assignee and location history derived from the patent record.
Assignees
| Assignee | Patents | Span |
|---|---|---|
| LILLIWYTE SA | 6 | 1986–1992 |
| SOUTH AFRICAN INVENTIONS | 2 | 1981–1987 |
| WEDLAKE ROGER Jself | 2 | 1980–1993 |
| BAXTER RODNEY C | 1 | 1993 |
| DE BEERS IND DIAMOND | 1 | 1977 |
Locations
| Location | Patents | Span |
|---|---|---|
| Johannesburg, ZA | 9 | 1977–1998 |
| Mulbarton, ZA | 3 | 1992–1997 |
| Rembrandt Park, Johannesburg, Transvaal, ZA | 1 | 1980 |