Inventor
Helmut Diekmann
Inventor
Menden, DE
Overview
Patents· 5 as inventor
Public. Assignee & technology derived from the patent record. Each patent links to its LexDana page.
F24Cprimary
F24CDomestic stoves or ranges38%
F23NRegulating or controlling combustion25%
C01BNon-metallic elements13%
C01DCompounds of alkali metals, i.e. lithium, sodium, potassium, rubidium, caesium, or francium13%
C23FNon-mechanical removal of metallic material from surface13%
PatentTitleYear
7,468,158'Corrosion inhibitor for protecting metallic materials in strongly alkaline medium'20085,787,874'Gas-fired ceramic-cooktop burner'19984,993,401'Control system for glass-top cooking unit'19914,951,646'Ventilated glass-top cooking unit'19904,333,917'Process of producing sulfuric acid'1982Career & activity timeline
Assembled from patent assignee/location history and declaration credentials.
1982Patents assigned to METALLGESELLSCHAFT AG (1)· patent assignee history
1982Based in Karben, DE· patent location history
1990–1991Patents assigned to CRAMER GMBH & CO KG (2)· patent assignee history
1990–1998Based in Menden, DE· patent location history
1998Patents assigned to CRAMER GMBH (1)· patent assignee history
2008Patents assigned to LANXESS DEUTSCHLAND GMBH (1)· patent assignee history
2008Based in Burscheid, DE· patent location history
Inventor activity
Assignee and location history derived from the patent record.
Assignees
| Assignee | Patents | Span |
|---|---|---|
| CRAMER GMBH & CO KG | 2 | 1990–1991 |
| CRAMER GMBH | 1 | 1998 |
| LANXESS DEUTSCHLAND GMBH | 1 | 2008 |
| METALLGESELLSCHAFT AG | 1 | 1982 |
Locations
| Location | Patents | Span |
|---|---|---|
| Menden, DE | 3 | 1990–1998 |
| Burscheid, DE | 1 | 2008 |
| Karben, DE | 1 | 1982 |