For the Inventor, By the Inventor

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Saint Paul, MN, United States of America

Porous Media Corporation

USPTO Granted Patents = 34

% Expired Patents = 8.8

EPO Patents = 3

Trademarks = 20

Forward Citations = 751

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35 inventors (with patents filed for the assignee):

Michael R Spearman (22 out of 38 patents)

John Henry Burban (10 out of 25 patents)

Robert Orvin Crowder (6 out of 10 patents)

4. Majid Zia (5 out of 35 patents)

5. Keith Allen Roberts (5 out of 30 patents)

6. Patrick Richard Spearman (4 out of 18 patents)

7. Craig Jonathan Cuta (3 out of 7 patents)

8. Mathews J Thundyil (3 out of 3 patents)

9. Daniel M Spearman (3 out of 3 patents)

10. Steven T Jersey (2 out of 54 patents)

11. Mark Mickan (2 out of 5 patents)

12. Philip M Rolchigo (2 out of 21 patents)

13. Carl Hahn (2 out of 8 patents)

14. Martin P Miller (2 out of 11 patents)

15. Kevin Carlson (2 out of 3 patents)

Core Competencies:

Toroidal Filter Vessel

Filtration System

Membrane Module

Gas Permeable Membrane

Oil Dehydrator

Filter-Drier

Hydrophobic Barrier

Spirometer Filter Media

Conical Coalescing Filter

Box Filter Apparatus

Reinforced Filter Tube

Two Step Filter

34 patents: Sort by Forward Citations

1. 9192880 - Toroidal filter vessel system (2015-11-24),

2. 8764980 - Filtration system and method (2014-07-01),

3. 8623215 - Membrane module for fluid filtration (2014-01-07),

4. 8540808 - Venting and filtration systems with gas permeable membrane (2013-09-24),

5. 8540807 - Venting and filtration systems with gas permeable membrane (2013-09-24),

6. 7998254 - Membrane module (2011-08-16),

7. 7875176 - Membrane module for fluid filtration (2011-01-25),

8. 7604685 - Method for the selective extraction of acids (2009-10-20),

9. 7413657 - Method for selective extraction (2008-08-19),

10. 6702880 - Inlet silencer/filter for an oxygen concentrator (2004-03-09),

11. 6692639 - Stacked conical filtration or separation apparatus (2004-02-17),

12. 6616735 - Compressed gas systems utilizing a variable pressure membrane air drier, and method of operation thereof (2003-09-09),

13. 6585808 - Membrane air dryer with integral diffuser and method of manufacture thereof (2003-07-01),

14. 6517725 - Oil dehydrator (2003-02-11),

15. 6508859 - Method and apparatus for removing air or gas from fluid (2003-01-21),

Company Overview

Porous Media Corporation, based in Saint Paul, MN, specializes in advanced filtration and separation technologies. The company focuses on developing innovative solutions for various industries, including water treatment, pharmaceuticals, and food processing. With a commitment to enhancing efficiency and sustainability, Porous Media leverages its expertise in porous materials to create products that optimize performance and reliability. Their research emphasizes the intersection of material science and engineering, driving advancements in filtration applications.

Profile summary synthesized from public USPTO records and patent filings.

Company Badge

USPTO Data Jan 1 1976 - Oct 13 2026

34 Patents

#38 in Saint Paul, MN

#284 in Minnesota

#10,014 in US

#19,631 in the World

Saint Paul, MN, United States of America

Porous Media Corporation

Forward Citations = 751

35 inventors:

Michael R Spearman (22 out of 38 patents)

John Henry Burban (10 out of 25 patents)

Robert Orvin Crowder (6 out of 10 patents)

4. Majid Zia (5 out of 35 patents)

5. Keith Allen Roberts (5 out of 30 patents)

IDiyas Innovation Intelligence. (2026). Company Patent Portfolio: Porous Media Corporation. Retrieved from https://idiyas.com/company/porous-media

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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