Growing community of inventors

Houston, TX, United States of America

Fred G Helfferich

Average Co-Inventor Count = 5.00

ph-index = 1

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 = 27

Fred G Helfferich ↔ Joseph Reisberg (1 patent)Fred G Helfferich ↔ Harold J Hill (1 patent)Fred G Helfferich ↔ Larry W Lake (1 patent)Fred G HelfferichFred G Helfferich (1 patent)Joseph ReisbergJoseph Reisberg (7 patents)Harold J HillHarold J Hill (5 patents)Larry W LakeLarry W Lake (1 patent)
..
Inventor’s number of patents
..
Strength of working relationships

Company Filing History:

1. Shell Oil Comapny (1 from 7,646 patents)


1 patent:

1. 4074755 - Ion exchange controlled chemically aided waterflood process

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as of
12/21/2025
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