Growing community of inventors

Liverpool, United Kingdom

Robert A Johnstone

Average Co-Inventor Count = 2.00

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 = 5

Robert A JohnstoneIan D Entwistle (1 patent)Robert A JohnstoneRobert A Johnstone (1 patent)Ian D EntwistleIan D Entwistle (8 patents)
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Inventor’s number of patents
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Strength of working relationships

Company Filing History:

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


1 patent:

1. 4211727 - Reduction of carboxylic acid halides to aldehydes

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12/20/2025
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