Karel H Leffelaar

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Amsterdam, NL

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Patents Grantslast 30 patents

Information Patent Grant
Block copolymers having improved combinations of properties
- Patent number 5,693,718
- Issue date Dec 2, 1997
- Shell Oil Company
- Hendrik De Groot
- C08 - ORGANIC MACROMOLECULAR COMPOUNDS THEIR PREPARATION OR CHEMICAL WORKING-...
Information Patent Grant
Process for manufacturing multiarmed asymmetrical radial block copo...
- Patent number 5,691,420
- Issue date Nov 25, 1997
- Shell Oil Company
- Karel Hendrik Leffelaar
- C08 - ORGANIC MACROMOLECULAR COMPOUNDS THEIR PREPARATION OR CHEMICAL WORKING-...

Patents Applicationslast 30 patents

Information Patent Application
Packaging tape adhesive composition and packaging tape comprising it
- Publication number 20060151901
- Publication date Jul 13, 2006
- Karel H Leffelaar
- C08 - ORGANIC MACROMOLECULAR COMPOUNDS THEIR PREPARATION OR CHEMICAL WORKING-...