Growing community of inventors

Chalfont, PA, United States of America

Jeffrey E Spethmann

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 = 41

Jeffrey E SpethmannJames T Keating (1 patent)Jeffrey E SpethmannJeffrey E Spethmann (1 patent)James T KeatingJames T Keating (9 patents)
..
Inventor’s number of patents
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Strength of working relationships

Company Filing History:

1. E.i. Dupont De Nemours and Company (1 from 16,338 patents)

2. Donaldson Comapny, Inc. (1 from 1,404 patents)


1 patent:

1. 6110333 - Composite membrane with highly crystalline porous support

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12/20/2025
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