Growing community of inventors

Batavia, IL, United States of America

Robert E Karll

Average Co-Inventor Count = 2.16

ph-index = 5

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 = 85

Robert E KarllJoseph J Valcho (3 patents)Robert E KarllRichard J Lee (2 patents)Robert E KarllDennis G Petrille (2 patents)Robert E KarllEdward W Heffern (1 patent)Robert E KarllEdmund J Piasek, Deceased (1 patent)Robert E KarllBy Evelyn Hunt, Administratrix (1 patent)Robert E KarllEdmund J Piasek (1 patent)Robert E KarllRobert E Karll (9 patents)Joseph J ValchoJoseph J Valcho (6 patents)Richard J LeeRichard J Lee (19 patents)Dennis G PetrilleDennis G Petrille (8 patents)Edward W HeffernEdward W Heffern (3 patents)Edmund J Piasek, DeceasedEdmund J Piasek, Deceased (3 patents)By Evelyn Hunt, AdministratrixBy Evelyn Hunt, Administratrix (2 patents)Edmund J PiasekEdmund J Piasek (1 patent)
..
Inventor’s number of patents
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Strength of working relationships

Company Filing History:

1. The Standard Oil Company (5 from 1,192 patents)

2. Standard Oil Company (Indiana) (4 from 1,055 patents)


9 patents:

1. 4384138 - Process and compositions

2. 4253974 - Oil recovery and mobility control in surfactant systems using the

3. 4142980 - Mannich reaction products made with alkyphenol substituted aliphatic

4. 4122020 - Oil recovery and mobility control using succinate surfactant systems

5. 4120800 - Oil recovery and mobility control using succinamate surfactant systems

6. 4070402 - Terpolymer alkylated phenol

7. 3985802 - Lubricating oils containing high molecular weight Mannich condensation

8. 3954849 - Preparation of alkenyl sulfonates

9. 3950401 - Olefin sulfonates

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as of
1/11/2026
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