Growing community of inventors

Timmins, Canada

David E Nightingale

Average Co-Inventor Count = 2.00

ph-index = 1

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 = 1

David E NightingaleGeorge M Freeman (1 patent)David E NightingaleDavid E Nightingale (1 patent)George M FreemanGeorge M Freeman (2 patents)
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Inventor’s number of patents
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Strength of working relationships

Company Filing History:

1. Texasgulf Inc. (1 from 26 patents)


1 patent:

1. 4225342 - Treatment of zinc plant leach residues for recovery of the contained

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1/9/2026
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