For the Inventor, By the Inventor

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Youngstown, OH, United States of America

Spirex Corporation

USPTO Granted Patents = 16

Trademarks = 2

Forward Citations = 252

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10 inventors (with patents filed for the assignee):

Paul N Colby (8 out of 8 patents)

Michael F Durina (6 out of 11 patents)

Timothy W Womer (5 out of 16 patents)

4. Shawn P Bodnar (3 out of 3 patents)

5. Bradley Paul Smith (2 out of 6 patents)

6. Joeo M Gatti (2 out of 2 patents)

7. Vue X Yang (2 out of 5 patents)

8. Paul T Colby (1 out of 1 patent)

9. Michael J Senediak (1 out of 1 patent)

10. Harry F White (1 out of 1 patent)

16 patents: Sort by Forward Citations

1. 6585001 - Flow through ring valve for plastic extruding systems (2003-07-01),

2. 6486432 - Method and laser cladding of plasticating barrels (2002-11-26),

3. 5931578 - Extruder and extrusion screw therefor (1999-08-03),

4. 5823668 - Extruder and extrusion screw therefor (1998-10-20),

5. 5816698 - Screw and plasticating apparatus and method (1998-10-06),

6. 5798077 - Screw for plasticating apparatus and method of use (1998-08-25),

7. 5439633 - Plastic extruder having a mixing valve with automatic shut-off (1995-08-08),

8. 5318357 - Extruder injection apparatus (1994-06-07),

9. 5188399 - Pipe coupling device and method (1993-02-23),

10. 5164207 - Plastic extruder with automatic shut-off valve (1992-11-17),

11. 5096302 - Plastic feeding device and method (1992-03-17),

12. 5071256 - Extruder injection apparatus and method (1991-12-10),

13. 5018917 - Apparatus for grooving the barrel of a plasticating machine (1991-05-28),

14. 4953279 - Method and apparatus for grooving the barrel of a plasticating machine (1990-09-04),

15. 4944906 - Methods of injection molding and extruding wet hygroscopic ionomers (1990-07-31),

Spirex Corporation is a leading provider of innovative industrial solutions. With a focus on cutting-edge technology and superior customer service, we specialize in delivering high-quality products for various industries including manufacturing, aerospace, and automotive. Our extensive experience and expertise make us the preferred choice for companies seeking reliable and efficient solutions to meet their unique business needs.

This text is generated by artificial intelligence and may not be accurate.

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USPTO Data Jan 1 1976 - Jan 13 2026

16 Patents

#7 in Youngstown, OH

#808 in Ohio

#19,348 in US

#36,748 in the World

Youngstown, OH, United States of America

Spirex Corporation

Forward Citations = 252

10 inventors:

Paul N Colby (8 out of 8 patents)

Michael F Durina (6 out of 11 patents)

Timothy W Womer (5 out of 16 patents)

4. Shawn P Bodnar (3 out of 3 patents)

5. Bradley Paul Smith (2 out of 6 patents)

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