Growing community of inventors

S. Williamsport, PA, United States of America

John D Freilich

Average Co-Inventor Count = 1.50

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 = 18

John D FreilichNorman O Sonntag (1 patent)John D FreilichSamuel Ellsworth Shull (1 patent)John D FreilichJohn D Freilich (3 patents)Norman O SonntagNorman O Sonntag (2 patents)Samuel Ellsworth ShullSamuel Ellsworth Shull (2 patents)
..
Inventor’s number of patents
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Strength of working relationships

Company Filing History:

1. Glyco Chemicals, Inc. (3 from 12 patents)


3 patents:

1. T973016 - Cyanoethylation of hydantoins

2. 4073927 - Di-quaternary ammonium salts of hydantoin and compositions thereof

3. 4073926 - Mono-quaternary ammonium salts of hydantoin and compositions thereof

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12/19/2025
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