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For the Inventor, By the Inventor

New York, NY, United States of America

Hazen & Sawyer, P.c.


USPTO Granted Patents = 3

Forward Citations = 71

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2 inventors (with patents filed for the assignee):

goldMedal Robert E Fergen (2 out of 2 patents)

silverMedal Richard J Steele (1 out of 14 patents)


3 patents:

1. 5916448 - Chemical conditioning of liquid and semi-liquid sludge for dewatering, (1999-06-29),
2. 5429750 - Method of treating wastewater sludges for pathogen removal and vector (1995-07-04),
3. 5385673 - Method of treating wastewater biosolids (1995-01-31),
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USPTO Data Jan 1 1976 - Dec 30 2025

3 Patents

#1,604 in New York, NY

#4,337 in New York

#72,023 in US

...
New York, NY, United States of America

Hazen & Sawyer, P.c.

Forward Citations = 71

2 inventors:

goldMedal Robert E Fergen (2 out of 2 patents)

silverMedal Richard J Steele (1 out of 14 patents)

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