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Sudlersville, MD, United States of America

Helen F Roberts

Average Co-Inventor Count = 3.00

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 = 12

Helen F RobertsChristian B Lundsager (2 patents)Helen F RobertsJames L Guthrie (2 patents)Helen F RobertsHelen F Roberts (2 patents)Christian B LundsagerChristian B Lundsager (22 patents)James L GuthrieJames L Guthrie (19 patents)
..
Inventor’s number of patents
..
Strength of working relationships

Company Filing History:

1. W. R. Grace Co. (2 from 853 patents)


2 patents:

1. 4661675 - Welding sealants for metals and method of use

2. 4559373 - Weldable sealants for metal and method of use

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as of
1/10/2026
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