Growing community of inventors

Columbia, MD, United States of America

David Charles Darwin

Average Co-Inventor Count = 3.91

ph-index = 10

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 = 647

David Charles DarwinEllis M Gartner (9 patents)David Charles DarwinLawrence L Kuo (5 patents)David Charles DarwinHideo Koyata (5 patents)David Charles DarwinByong-Wa Chun (5 patents)David Charles DarwinAhmad Arfaei (4 patents)David Charles DarwinAra A Jeknavorian (2 patents)David Charles DarwinNeal Steven Berke (1 patent)David Charles DarwinDing Feng Shen (1 patent)David Charles DarwinJames Franklin Lambert (1 patent)David Charles DarwinLeslie Ann Jardine (1 patent)David Charles DarwinLawrence Reeder Roberts (1 patent)David Charles DarwinXiaojia Zhang (1 patent)David Charles DarwinRobert T Taylor (1 patent)David Charles DarwinDavid Charles Darwin (10 patents)Ellis M GartnerEllis M Gartner (27 patents)Lawrence L KuoLawrence L Kuo (33 patents)Hideo KoyataHideo Koyata (16 patents)Byong-Wa ChunByong-Wa Chun (15 patents)Ahmad ArfaeiAhmad Arfaei (15 patents)Ara A JeknavorianAra A Jeknavorian (20 patents)Neal Steven BerkeNeal Steven Berke (51 patents)Ding Feng ShenDing Feng Shen (3 patents)James Franklin LambertJames Franklin Lambert (2 patents)Leslie Ann JardineLeslie Ann Jardine (1 patent)Lawrence Reeder RobertsLawrence Reeder Roberts (1 patent)Xiaojia ZhangXiaojia Zhang (1 patent)Robert T TaylorRobert T Taylor (1 patent)
..
Inventor’s number of patents
..
Strength of working relationships

Company Filing History:

1. W. R. Grace Co.-Conn. (9 from 1,391 patents)

2. Other (1 from 833,002 patents)


10 patents:

1. 6139623 - Emulsified comb polymer and defoaming agent composition and method of

2. 5840114 - High early-strength-enhancing admixture for precast hydraulic cement and

3. 5753744 - Cement and cement composition having improved rheological properties

4. 5728207 - Cement admixture product having improved rheological properties and

5. 5725657 - Cement admixture product

6. 5665158 - Cement admixture product

7. 5643978 - Cement admixture product having improved rheological properties and

8. 5633298 - Cement admixture product having improved rheological properties and

9. 5583183 - Cement and cement composition having improved rheological properties

10. 5393343 - Cement and cement composition having improved rheological properties

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as of
1/22/2026
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