Growing community of inventors

San Diego, CA, United States of America

Walter Callen

Average Co-Inventor Count = 4.74

ph-index = 8

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 = 222

Walter CallenEric J Mathur (21 patents)Walter CallenGerhard Johann Frey (17 patents)Walter CallenToby Howard Richardson (17 patents)Walter CallenJay Milton Short (16 patents)Walter CallenCarl A Miller (10 patents)Walter CallenKevin A Gray (9 patents)Walter CallenJanne Samuli Kerovuo (9 patents)Walter CallenMalgorzata Slupska (9 patents)Walter CallenMartin Kazaoka (8 patents)Walter CallenBrian Steer (6 patents)Walter CallenShaun Healey (6 patents)Walter CallenDi Wu (4 patents)Walter CallenGeoff Hazlewood (4 patents)Walter CallenDavid Blum (4 patents)Walter CallenAlireza Esteghlalian (4 patents)Walter CallenNelson Robert Barton (3 patents)Walter CallenEileen O'Donoghue (3 patents)Walter CallenDerrick Pulliam (2 patents)Walter CallenCarl Miller (2 patents)Walter CallenMatgorzata Slupska (2 patents)Walter CallenEileen O'donoghue (1 patent)Walter CallenCarl Miller (0 patent)Walter CallenMatgorzata Slupska (0 patent)Walter CallenDerrick Syngenta Biotechnology Inc Pulliam (0 patent)Walter CallenCarl Miller (0 patent)Walter CallenWalter Callen (29 patents)Eric J MathurEric J Mathur (65 patents)Gerhard Johann FreyGerhard Johann Frey (83 patents)Toby Howard RichardsonToby Howard Richardson (45 patents)Jay Milton ShortJay Milton Short (174 patents)Carl A MillerCarl A Miller (11 patents)Kevin A GrayKevin A Gray (36 patents)Janne Samuli KerovuoJanne Samuli Kerovuo (21 patents)Malgorzata SlupskaMalgorzata Slupska (14 patents)Martin KazaokaMartin Kazaoka (8 patents)Brian SteerBrian Steer (14 patents)Shaun HealeyShaun Healey (13 patents)Di WuDi Wu (55 patents)Geoff HazlewoodGeoff Hazlewood (13 patents)David BlumDavid Blum (9 patents)Alireza EsteghlalianAlireza Esteghlalian (5 patents)Nelson Robert BartonNelson Robert Barton (35 patents)Eileen O'DonoghueEileen O'Donoghue (13 patents)Derrick PulliamDerrick Pulliam (8 patents)Carl MillerCarl Miller (2 patents)Matgorzata SlupskaMatgorzata Slupska (2 patents)Eileen O'donoghueEileen O'donoghue (4 patents)Carl MillerCarl Miller (0 patent)Matgorzata SlupskaMatgorzata Slupska (0 patent)Derrick Syngenta Biotechnology Inc PulliamDerrick Syngenta Biotechnology Inc Pulliam (0 patent)Carl MillerCarl Miller (0 patent)
..
Inventor’s number of patents
..
Strength of working relationships

Company Filing History:

1. Verenium Corporation (15 from 69 patents)

2. Syngenta Participations Ag (5 from 1,777 patents)

3. Diversa Corporation (4 from 112 patents)

4. Basf Enzymes LLC (4 from 39 patents)

5. Bp Corporation North America Inc. (3 from 494 patents)


29 patents:

1. 10066222 - Amylases, nucleic acids encoding them and method of producing an oil

2. 10047350 - Enzymes having alpha amylase activity and methods of making and using them

3. 9765319 - Xylanases, nucleic acids encoding them and methods for making and using them

4. 9701950 - Amylases, nucleic acids encoding them and methods for making and using them

5. 9422536 - Glucanases, nucleic acids encoding them and methods for making and using them

6. 9062295 - Recombinant polypeptides

7. 8728769 - Xylanases, nucleic acids encoding them and methods for making and using them

8. 8338131 - Amylases and methods for use in starch processing

9. 8334118 - Enzymes having alpha amylase activity and methods of making and using them

10. 8222035 - Amylases, nucleic acids encoding them and methods for making and using them

11. 8148126 - Polymerase

12. 7960148 - Glucanases, nucleic acids encoding them and methods for making and using them

13. 7816108 - Methods for using polypeptides having amylase activity and nucleic acids encoding them

14. 7785855 - Nucleic acids encoding polypeptides having amylase activity and methods of making and using them

15. 7781198 - Polymerase-encoding nucleic acids and method of making and using them

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12/6/2025
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