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Forward Citations = 177

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2 inventors (with patents filed for the assignee):

Egbert deVries (8 out of 15 patents)

Harold J Rafson (3 out of 5 patents)

9 patents: Sort by Forward Citations

1. 4863495 - Process for removing volatile organic compounds from air streams (1989-09-05),

2. 4844874 - Method and means for controlling mist scrubber operation (1989-07-04),

3. 4457214 - Refrigerated structure (1984-07-03),

4. 4416861 - Two stage odor control system (1983-11-22),

5. 4378851 - Method for inhibiting explosions (1983-04-05),

6. 4308241 - Formation of reactive droplet dispersion (1981-12-29),

7. 4308040 - Apparatus for neutralizing odors (1981-12-29),

8. 4302226 - Apparatus for neutralizing odors (1981-11-24),

9. 4284609 - Condensation cleaning of particulate laden gases (1981-08-18),

Quad Environmental Technologies Corp. is a leading provider of innovative air purification solutions for commercial and industrial applications. With a focus on sustainability and efficiency, Quad's solutions help businesses improve indoor air quality and reduce environmental impact. Their advanced technologies and customizable systems make Quad Environmental Technologies Corp. a trusted partner for companies seeking to enhance their work environments.

Profile summary based on public USPTO records.

Company Badge

USPTO Data Jan 1 1976 - Sep 29 2026

9 Patents

#6 in Highland Park, IL

#1,549 in Illinois

#32,549 in US

Highland Park, IL, United States of America

Quad Environmental Technologies Corp.

Forward Citations = 177

2 inventors:

Egbert deVries (8 out of 15 patents)

Harold J Rafson (3 out of 5 patents)

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