For the Inventor, By the Inventor

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Mountville, PA, United States of America

Quaker Plastic Corporation

USPTO Granted Patents = 13

% Expired Patents = 23.1

Trademarks = 1

Forward Citations = 211

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10 inventors (with patents filed for the assignee):

Donald E Dahowski (13 out of 17 patents)

James G Wilson (3 out of 5 patents)

Christopher B Presler (2 out of 2 patents)

4. Allen L Kinner (2 out of 2 patents)

5. Paul D Spies (2 out of 2 patents)

6. Matthew A Cramer (1 out of 1 patent)

7. William A Dillen, Ii (1 out of 1 patent)

8. Matthew B Schlager (1 out of 1 patent)

9. Stephen F Gray, Sr (1 out of 1 patent)

10. Scott E Crandall (1 out of 1 patent)

13 patents: Sort by Forward Citations

1. 6729795 - Modular drain and drain system (2004-05-04),

2. 6655098 - Stair module support and leveling system (2003-12-02),

3. 6612780 - Modular trench drain system (2003-09-02),

4. 5560178 - Method for covering openings contiguous to a swimming pool (1996-10-01),

5. 5557904 - Thermoformable plastic framin/connecting strip (1996-09-24),

6. 5417016 - Cover for openings contiguous to a swimming pool (1995-05-23),

7. 4980934 - Retrofittable receptor device (1991-01-01),

8. 4873802 - Plastic module rigidizing system (1989-10-17),

9. 4829732 - Anchor socket jig assembly (1989-05-16),

10. 4735395 - Interfacial separator for concrete structures (1988-04-05),

11. 4589237 - Stair module support and leveling construction (1986-05-20),

12. 4548009 - Concrete expansion joint (1985-10-22),

13. 4490067 - Modular drain system (1984-12-25),

Quaker Plastic Corporation, based in Mountville, PA, specializes in the development and manufacturing of high-quality plastic products, particularly in the field of custom plastic solutions. The company focuses on innovative design and engineering to meet the diverse needs of its clients across various industries. With a commitment to quality and sustainability, Quaker Plastic serves both domestic and international markets, providing tailored solutions that enhance operational efficiency and product performance.

Profile summary based on public USPTO records.

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USPTO Data Jan 1 1976 - Oct 6 2026

13 Patents

#1 in Mountville, PA

#852 in Pennsylvania

#23,815 in US

#44,988 in the World

Mountville, PA, United States of America

Quaker Plastic Corporation

Forward Citations = 211

10 inventors:

Donald E Dahowski (13 out of 17 patents)

James G Wilson (3 out of 5 patents)

Christopher B Presler (2 out of 2 patents)

4. Allen L Kinner (2 out of 2 patents)

5. Paul D Spies (2 out of 2 patents)

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