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Maryland Heights, MO, United States of America

William R Purdum

Average Co-Inventor Count = 1.09

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 = 14

William R PurdumJeffry Golden (1 patent)William R PurdumCharles W Martin (1 patent)William R PurdumWilliam R Purdum (8 patents)Jeffry GoldenJeffry Golden (18 patents)Charles W MartinCharles W Martin (2 patents)
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Inventor’s number of patents
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Strength of working relationships

Company Filing History:

1. Monsanto Company (7 from 3,288 patents)

2. Cleanearth Technologies Inc. (1 from 10 patents)


8 patents:

1. 7256320 - Method for defeat of bulk chemical warfare agents

2. 4483705 - Alkylphosphonate diesters and monoesters of N-phosphonomethylglycinate

3. 4442044 - Process for preparing monoesters and diesters of N-alkyl substituted

4. 4395275 - Mono and diesters of N-phosphonomethylglycinates as herbicides

5. 4391625 - Diesters of N-alkyl substituted amino methyl phosphonic acid useful as

6. 4388102 - Alkylphosphonate diesters of N-phosphonomethylglycinate as herbicides

7. 4388103 - Alkylphosphonate monoesters of N-phosphonomethylglycinate as herbicides

8. 4385921 - Cyanoalkylphosphonate diesters of N-phosphonomethylglycinonitrile as

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as of
12/6/2025
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