Ulfert E. Wiersum

Person

AV Velp, NL

People

Patents Grantslast 30 patents

Information Patent Grant
Non-linear optical polycarbonates
- Patent number 5,872,882
- Issue date Feb 16, 1999
- Akzo Nobel N.V.
- Richard Herman Woudenberg
- C08 - ORGANIC MACROMOLECULAR COMPOUNDS THEIR PREPARATION OR CHEMICAL WORKING-...
Information Patent Grant
Non-linear optically active polycarbonate
- Patent number 5,688,896
- Issue date Nov 18, 1997
- Akzo Nobel N.V.
- Tjerk Oedse Boonstra
- C08 - ORGANIC MACROMOLECULAR COMPOUNDS THEIR PREPARATION OR CHEMICAL WORKING-...
Information Patent Grant
Non-linear optically active polycarbonate
- Patent number 5,588,083
- Issue date Dec 24, 1996
- Akzo Nobel N.V.
- Tjerk O. Boonstra
- C08 - ORGANIC MACROMOLECULAR COMPOUNDS THEIR PREPARATION OR CHEMICAL WORKING-...
Information Patent Grant
Process for the degradation of polymers
- Patent number 4,374,938
- Issue date Feb 22, 1983
- Akzona Incorporated
- Willem F. Verhelst
- C08 - ORGANIC MACROMOLECULAR COMPOUNDS THEIR PREPARATION OR CHEMICAL WORKING-...
Information Patent Grant
Thermosetting coating composition containing a blocked acid catalyst
- Patent number 4,351,935
- Issue date Sep 28, 1982
- Akzo nv
- Johan B. Reesink
- C07 - ORGANIC CHEMISTRY
Information Patent Grant
Fire retardant compounds
- Patent number 4,049,726
- Issue date Sep 20, 1977
- Akzona Incorporated
- Hendrik Harm Jannes Oosterwijk
- C07 - ORGANIC CHEMISTRY
Information Patent Grant
Process for the preparation of a p,p'-dicyanobibenzyl and a m,m'-di...
- Patent number 3,984,452
- Issue date Oct 5, 1976
- Akzona Incorporated
- Ulfert Elle Wiersum
- C07 - ORGANIC CHEMISTRY
Information Patent Grant
Polymerization of ethylenically unsaturated compounds
- Patent number 3,948,858
- Issue date Apr 6, 1976
- Akzo N.V.
- Ulfert Elle Wiersum
- C08 - ORGANIC MACROMOLECULAR COMPOUNDS THEIR PREPARATION OR CHEMICAL WORKING-...

Ulfert E. Wiersum

Person

Patents Grantslast 30 patents

Non-linear optical polycarbonates

Non-linear optically active polycarbonate

Non-linear optically active polycarbonate

Process for the degradation of polymers

Thermosetting coating composition containing a blocked acid catalyst

Fire retardant compounds

Process for the preparation of a p,p'-dicyanobibenzyl and a m,m'-di...

Polymerization of ethylenically unsaturated compounds