John Blackwell

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Kennett Square, PA, US

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Patents Grantslast 30 patents

Information Patent Grant
Green-yellow to orange monoazo paper dyes
- Patent number 4,071,312
- Issue date Jan 31, 1978
- E. I. Du Pont de Nemours and Company
- John Blackwell
- C09 - DYES PAINTS POLISHES NATURAL RESINS ADHESIVES MISCELLANEOUS COMPOSITION...