Growing community of inventors

Kilmarnock, United Kingdom

David R Walker

Average Co-Inventor Count = 2.00

ph-index = 3

The patent ph-index is calculated by counting the number of publications for which an author has been cited by other authors at least that same number of times.

Forward Citations = 131

David R WalkerJohn E Cadotte (3 patents)David R WalkerDavid R Walker (3 patents)John E CadotteJohn E Cadotte (13 patents)
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Inventor’s number of patents
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Strength of working relationships

Company Filing History:

1. The Dow Chemical Company (2 from 7,680 patents)

2. Filmtec Corporation (1 from 13 patents)


3 patents:

1. 4824574 - Novel water softening process using membranes

2. 4812270 - Novel water softening membranes

3. 4765897 - Polyamide membranes useful for water softening

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1/5/2026
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