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Woodcliff Lake, NJ, United States of America

David C Purpi

Average Co-Inventor Count = 2.00

ph-index = 2

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 = 5

David C Purpi ↔ Donald A Keyworth (1 patent)David C Purpi ↔ Roy G Turnbo (1 patent)David C PurpiDavid C Purpi (2 patents)Donald A KeyworthDonald A Keyworth (16 patents)Roy G TurnboRoy G Turnbo (3 patents)
..
Inventor’s number of patents
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Strength of working relationships

Company Filing History:

1. Tenneco Chemicals, Inc. (2 from 124 patents)


2 patents:

1. 4277567 - Flame-retardant vinyl aromatic polymer compositions

2. 4107230 - Flame-retardant thermosetting resinous compositions

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as of
1/16/2026
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