John David Withenshaw

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Northop, GB

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Patents Grantslast 30 patents

Information Patent Grant
Method for the alkaline bleaching of pulp with a peroxyacid based o...
- Patent number 6,569,286
- Issue date May 27, 2003
- Warwick International Group Limited
- John David Withenshaw
- D21 - PAPER-MAKING PRODUCTION OF CELLULOSE
Information Patent Grant
Bleach activator compositions
- Patent number 6,080,710
- Issue date Jun 27, 2000
- Warwick International Group Limited
- John David Withenshaw
- C11 - ANIMAL AND VEGETABLE OILS, FATS, FATTY SUBSTANCES AND WAXES FATTY ACIDS...
Information Patent Grant
Agglomerated active with controlled release
- Patent number 5,800,755
- Issue date Sep 1, 1998
- Warwick International Group Limited
- John David Withenshaw
- C11 - ANIMAL AND VEGETABLE OILS, FATS, FATTY SUBSTANCES AND WAXES FATTY ACIDS...
Information Patent Grant
Granulation process for making granular bleach activator compositio...
- Patent number 5,433,881
- Issue date Jul 18, 1995
- Warwick International Group Limited
- John Townend
- C11 - ANIMAL AND VEGETABLE OILS, FATS, FATTY SUBSTANCES AND WAXES FATTY ACIDS...
Information Patent Grant
Bleach activator compositions
- Patent number 4,921,631
- Issue date May 1, 1990
- Warwick International Limited
- Anthony J. Gradwell
- C11 - ANIMAL AND VEGETABLE OILS, FATS, FATTY SUBSTANCES AND WAXES FATTY ACIDS...