Growing community of inventors

Allentown, PA, United States of America

Richard E Filippi

Average Co-Inventor Count = 2.40

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 = 17

Richard E Filippi ↔ Alan L Prentice (1 patent)Richard E Filippi ↔ Leonard J Hvizdos (1 patent)Richard E Filippi ↔ Richard E Luybli (1 patent)Richard E FilippiRichard E Filippi (2 patents)Alan L PrenticeAlan L Prentice (8 patents)Leonard J HvizdosLeonard J Hvizdos (4 patents)Richard E LuybliRichard E Luybli (1 patent)
..
Inventor’s number of patents
..
Strength of working relationships

Company Filing History:

1. Air Products and Chemicals, Inc. (2 from 3,193 patents)


2 patents:

1. 4315409 - Cryogenic freezing system

2. 4179897 - Isentropic expansion of gases via a pelton wheel

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as of
1/21/2026
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