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Janesville, WI, United States of America

William J Zeman

Average Co-Inventor Count = 1.50

ph-index = 4

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 = 118

William J ZemanJames G Fuller (1 patent)William J ZemanCraig Poffenberger (1 patent)William J ZemanLeonard Hughes (1 patent)William J ZemanYvonne D R Deac (1 patent)William J ZemanCraig A Poffenberger (0 patent)William J ZemanWilliam J Zeman (4 patents)James G FullerJames G Fuller (4 patents)Craig PoffenbergerCraig Poffenberger (2 patents)Leonard HughesLeonard Hughes (2 patents)Yvonne D R DeacYvonne D R Deac (1 patent)Craig A PoffenbergerCraig A Poffenberger (0 patent)
..
Inventor’s number of patents
..
Strength of working relationships

Company Filing History:

1. Sherex Chemical Company, Inc. (3 from 54 patents)

2. Goldschmidt Chemical Corporation (1 from 9 patents)

3. Evonik Goldschmidt Corporation (80 patents)


4 patents:

1. 6458343 - Quaternary compounds, compositions containing them, and uses thereof

2. 5200097 - Process for making a particulate water dispersible free flowing fabric

3. 5015412 - Alkaline tolerant sulfobetaine amphoteric surfactants

4. 4913841 - Alkaline tolerant sulfobetaine amphoteric surfactants

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as of
12/31/2025
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