Growing community of inventors

Seminole, OK, United States of America

Robert E Crumb

Average Co-Inventor Count = 2.40

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 = 17

Robert E CrumbDerry D Sparlin (1 patent)Robert E CrumbDonald L Whitfill (1 patent)Robert E CrumbJohn N Dew (1 patent)Robert E CrumbRobert E Crumb (2 patents)Derry D SparlinDerry D Sparlin (12 patents)Donald L WhitfillDonald L Whitfill (10 patents)John N DewJohn N Dew (4 patents)
..
Inventor’s number of patents
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Strength of working relationships

Company Filing History:

1. Continental Oil Company (2 from 304 patents)


2 patents:

1. 4062405 - Method of treating oil-bearing formations using molten sulfur insulating

2. 4034811 - Method for sealing a permeable subterranean formation

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as of
12/15/2025
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