For the Inventor, By the Inventor

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Chippewa Falls, WI, United States of America

Extrusion Dies, Inc.

USPTO Granted Patents = 15

EPO Patents = 1

Forward Citations = 177

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11 inventors (with patents filed for the assignee):

Vernon J Krupa (7 out of 7 patents)

Harry G Lippert (7 out of 7 patents)

John A Ulcej (5 out of 12 patents)

4. Donald R Garton (4 out of 4 patents)

5. Gregory M Wilson (3 out of 8 patents)

6. John W Ryan (2 out of 2 patents)

7. Dale Pitsch (1 out of 12 patents)

8. Brian M Pitsch (1 out of 5 patents)

9. F John Herrington (1 out of 8 patents)

10. John A Ulcei (1 out of 1 patent)

11. Jeffrey M Seckora (1 out of 1 patent)

15 patents: Sort by Forward Citations

1. 6663375 - Dual flexible lip extrusion apparatus with pivoting actuation member (2003-12-16),

2. 6626206 - Feedblock for adjusting the dimensions of a set of co-extruded layers of a multi-layer sheet (2003-09-30),

3. 6367776 - Flow control device and apparatus for mounting same (2002-04-09),

4. 6352424 - Extrusion die membrane assembly (2002-03-05),

5. 6206680 - Extrusion die membrane (2001-03-27),

6. 6109592 - Flow control device and apparatus for mounting same (2000-08-29),

7. 5962041 - Dual flexible lip extrusion apparatus (1999-10-05),

8. 5780067 - Adjustable coextrusion feedblock (1998-07-14),

9. 5770240 - Extrusion die for rigid foam sheet (1998-06-23),

10. 5679383 - Dual flexible lip extrusion apparatus (1997-10-21),

11. 5618568 - Dual-chamber vacuum box (1997-04-08),

12. 5511962 - Extrusion die (1996-04-30),

13. 5494429 - Apparatus for extruding thermoplastic materials (1996-02-27),

14. 5375990 - Feed block for coextrusion apparatus (1994-12-27),

15. 5067432 - Replaceable wiping insert for slot die head (1991-11-26),

Extrusion Dies, Inc. is a leading manufacturer of high-quality custom extrusion dies for the plastics industry. With over 40 years of experience, we offer precision engineering and innovative solutions to improve productivity and efficiency. Our state-of-the-art facilities and team of experts ensure top-notch performance and customer satisfaction.

Profile summary based on public USPTO records.

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USPTO Data Jan 1 1976 - Sep 29 2026

15 Patents

#1 in Chippewa Falls, WI

#486 in Wisconsin

#21,026 in US

#39,846 in the World

Chippewa Falls, WI, United States of America

Extrusion Dies, Inc.

Forward Citations = 177

11 inventors:

Vernon J Krupa (7 out of 7 patents)

Harry G Lippert (7 out of 7 patents)

John A Ulcej (5 out of 12 patents)

4. Donald R Garton (4 out of 4 patents)

5. Gregory M Wilson (3 out of 8 patents)

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