Inventor

Leendert Hendrik De Graaff

Inventor

Oosterbeek, NL

Overview

15→

Patents

1994–2013

Patent span

Chemistry

Primary field (CPC C)

Patents· 15 as inventor

Public. Assignee & technology derived from the patent record. Each patent links to its LexDana page.

C12Nprimary

C12NMicroorganisms or enzymes24%

C12YEnzymes17%

D21CProduction of cellulose by removing non-cellulose substances from cellulose-containing materials10%

A23KFodder8%

C07KPeptides6%

C12CBeer6%

C12HPasteurisation, sterilisation, preservation, purification, clarification or ageing of alcoholic beverages6%

C12PFermentation or enzyme-using processes to synthesise a desired chemical compound or composition or to separate optical isomers from a racemic mixture6%

C12QMeasuring or testing processes involving enzymes, nucleic acids or microorganisms6%

A21DTreatment of flour or dough for baking, e.g. by addition of materials3%

PatentTitleYear

8,461,320'Method to isolate mutants and to clone the complementing gene'2013 6,599,745'Method to isolate mutants and to clone the complementing gene'2003 6,558,937'Cellulose degrading enzymes of aspergillus'2003 6,306,635'Fungal cellulases'2001 6,300,112'.beta.-xylosidase, nucleotide sequence encoding it, and use thereof'2001 6,190,890'Fungal cellulases'2001 6,177,261'Method to isolate mutants and to clone the complementing gene'2001 6,066,356'Arabinoxylan degrading enzymes'2000 6,010,892'Method to alter the properties of acetylated xylan'2000 5,989,887'Cloning and expression of DNA molecules incoding arabinan-degrading enzymes of fungal origin'1999 5,849,559'Arabinoxylan degrading enzymes'1998 5,763,260'Method to alter the properties of acetylated xylan'1998 5,681,732'Cloning and expression of acetyl xylan esterases from fungal origin'1997 5,426,043'Cloning and expression of acetyl xylan esterases from fungal origin'1995 5,358,864'Cloning and expression of xylanase genes from fungal origin'1994

Career & activity timeline

Assembled from patent assignee/location history and declaration credentials.

1994–1995Patents assigned to GIST BROCADES NV (2)· patent assignee history

1994Based in Arnhem, NL· patent location history

1995–2013Based in Oosterbeek, NL· patent location history

1997–2001Patents assigned to GIST BROCADES BV (7)· patent assignee history

1999–2003Patents assigned to DSM NV (2)· patent assignee history

2001–2003Patents assigned to DANISCO INGREDIENTS AS (3)· patent assignee history

2013Patents assigned to DE GRAAFF LEENDERT HENDRIK (1)· patent assignee history

Inventor activity

Assignee and location history derived from the patent record.

Assignees

Assignee	Patents	Span
GIST BROCADES BV	7	1997–2001
DANISCO INGREDIENTS AS	3	2001–2003
DSM NV	2	1999–2003
GIST BROCADES NV	2	1994–1995
DE GRAAFF LEENDERT HENDRIKself	1	2013

Locations

Location	Patents	Span
Oosterbeek, NL	14	1995–2013
Arnhem, NL	1	1994