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Kennewick, WA, United States of America

Donald E Freepons

Average Co-Inventor Count = 1.24

ph-index = 5

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 = 127

Donald E FreeponsG Graham Allan (2 patents)Donald E FreeponsGeorge M Crews (2 patents)Donald E FreeponsDonald E Freepons (7 patents)G Graham AllanG Graham Allan (17 patents)George M CrewsGeorge M Crews (6 patents)
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Inventor’s number of patents
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Strength of working relationships

Company Filing History:

1. Melamine Chemicals, Inc. (5 from 21 patents)

2. Other (2 from 832,718 patents)


7 patents:

1. 5139555 - Fertilizer processes and compositions using s-triazines

2. 4964894 - Plant growth regulators derived from chitin

3. 4832728 - Fertilizer compositions, processes of making them, and pocesses of using

4. 4812159 - Plant growth regulators derived from chitin

5. 4560400 - Fertilizer compositions, processes of making them and processes of using

6. 4559075 - Fertilizer processes and compositions using s-triazines

7. 4554003 - Fertilizer processes and compositions using s-triazines

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as of
12/15/2025
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