Inventor
Bernhard Piotrowski
Inventor
Lohmar, DE
Overview
Patents· 5 as inventor
Public. Assignee & technology derived from the patent record. Each patent links to its LexDana page.
B01Jprimary
B01JChemical or physical processes, e.g. catalysis or colloid chemistry17%
C07CAcyclic or carbocyclic compounds17%
B01DSeparation8%
B01FMixing, e.g. dissolving, emulsifying or dispersing8%
B29CShaping or joining of plastics8%
C08JWorking-up8%
C08KUse of inorganic or non-macromolecular organic substances as compounding ingredients8%
D01DMechanical methods or apparatus in the manufacture of artificial filaments, threads, fibres, bristles or ribbons8%
Y02PClimate change mitigation technologies in the production or processing of goods8%
Y10TTechnical subjects covered by former us classification8%
PatentTitleYear
6,350,400'Method for producing flexible PVC'20025,277,878'Reactor for heterogeneous-phase reactions'19944,783,564'Method for the preparation of 1,2-dichloroethane'19884,642,262'Method of making fibrids from thermoplastics'19874,118,313'Process and apparatus for mass transfer between heterogeneous systems'1978Career & activity timeline
Assembled from patent assignee/location history and declaration credentials.
1978–1987Patents assigned to DYNAMIT NOBEL AG (2)· patent assignee history
1978Based in Bochum, DE· patent location history
1987–2002Based in Lohmar, DE· patent location history
1988–2002Patents assigned to HUELS TROISDORF (2)· patent assignee history
1994Patents assigned to HUELS CHEMISCHE WERKE AG (1)· patent assignee history
Inventor activity
Assignee and location history derived from the patent record.
Assignees
| Assignee | Patents | Span |
|---|---|---|
| DYNAMIT NOBEL AG | 2 | 1978–1987 |
| HUELS TROISDORF | 2 | 1988–2002 |
| HUELS CHEMISCHE WERKE AG | 1 | 1994 |
Locations
| Location | Patents | Span |
|---|---|---|
| Lohmar, DE | 4 | 1987–2002 |
| Bochum, DE | 1 | 1978 |