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Menlo Park, CA, United States of America

Envirotech Corporation

Calculating rank

USPTO Granted Patents = 158

EPO Patents = 1

Trademarks = 3

Forward Citations = 1,892

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144 inventors (with patents filed for the assignee):

Steven S Davis (17 out of 30 patents)

Robert C Emmett, Jr (16 out of 20 patents)

Lawrence T O'Connor (7 out of 7 patents)

4. Ralph B Haymore (6 out of 10 patents)

5. Frank A Baczek (6 out of 6 patents)

6. Bruce C Wojcik (6 out of 8 patents)

7. Lynn W Cook (4 out of 7 patents)

8. Vernon R Degner (4 out of 4 patents)

9. William L Fismer (4 out of 4 patents)

10. Lawrence L Tuttle (4 out of 4 patents)

11. Yoshihiro Takahashi (4 out of 8 patents)

12. Charles Lonnie Meurer (3 out of 49 patents)

13. Gunter H Brox (3 out of 4 patents)

14. Brent C Black (3 out of 6 patents)

15. Horst Honacker (3 out of 6 patents)

Core Competencies:

Waste Treatment

Sludge Digesters

Bioslurry Reactors

Sedimentation Apparatus

Flocculating Agents

Gas-Liquid Separation

Electrostatic Precipitators

Wastewater Treatment

Copper Recovery

Lime Slaking

Filtration Systems

Clarifier Apparatus

158 patents: Sort by Forward Citations

1. 5678498 - Process and apparatus for ventless combustion of waste (1997-10-21),

2. 5227136 - Bioslurry reactor for treatment of slurries containing minerals, soils (1993-07-13),

3. 5116443 - Clarifier apparatus and methods with 3D arrays (1992-05-26),

4. 5106499 - Apparatus for shifting filter plates in a filter press (1992-04-21),

5. 5092482 - Sludge digesters with separate liquid chambers to buoy ballast members (1992-03-03),

6. 5064532 - Apparatus for shifting filter plates in a filter press (1991-11-12),

7. 5057284 - Bioslurry reactor for treatment of slurries containing minerals, soils (1991-10-15),

8. 5007620 - Apparatus for biological processing of metal-containing ores (1991-04-16),

9. 5006241 - Apparatus for shifting filter plates in a filter press (1991-04-09),

10. 4974816 - Method and apparatus for biological processing of metal-containing ores (1990-12-04),

11. D312494 - Partition for a waste water treatment container (1990-11-27),

12. 4968008 - Bioleaching apparatus and system (1990-11-06),

13. 4933524 - Clarifier apparatus and methods with 3-D arrays (1990-06-12),

14. 4931190 - Flocculating agent combinations for mineral slime filtration systems (1990-06-05),

15. 4927537 - Tape drive with self-expanding coils for sludge collector (1990-05-22),

Company Overview

Envirotech Corporation, based in Menlo Park, California, specializes in innovative waste treatment technologies aimed at enhancing environmental sustainability. The company focuses on developing advanced solutions such as sludge digesters, bioslurry reactors, and sedimentation apparatus, which are essential for efficient waste management. Additionally, Envirotech is engaged in the research and application of flocculating agents, gas-liquid separation techniques, and electrostatic precipitators, contributing significantly to the field of wastewater treatment.

Profile summary synthesized from public USPTO records and patent filings.

Company Badge

USPTO Data Jan 1 1976 - Oct 27 2026

158 Patents

#12 in Menlo Park, CA

#548 in California

#2,516 in US

#5,214 in the World

Menlo Park, CA, United States of America

Envirotech Corporation

Forward Citations = 1,892

144 inventors:

Steven S Davis (17 out of 30 patents)

Robert C Emmett, Jr (16 out of 20 patents)

Lawrence T O'Connor (7 out of 7 patents)

4. Ralph B Haymore (6 out of 10 patents)

5. Frank A Baczek (6 out of 6 patents)

IDiyas Innovation Intelligence. (2026). Company Patent Portfolio: Envirotech Corporation. Retrieved from https://idiyas.com/company/envirotech

Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile

Data Sources: USPTO Patent Grant XML, Patent Center, EPO & CIPO • Normalized by IDiyas Innovation Graph. Methodology & provenance architecturePlease report any incorrect information to [email protected]

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