For the Inventor, By the Inventor

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Prospect Heights, IL, United States of America

Plitek, LLC

USPTO Granted Patents = 19

% Expired Patents = 5.3

CIPO Patents = 1

EPO Patents = 3

Trademarks = 4

Forward Citations = 213

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21 inventors (with patents filed for the assignee):

Karl K Hoffman (14 out of 15 patents)

Steve Kaganovich (6 out of 7 patents)

Robert C Larsen, Jr (5 out of 5 patents)

4. Thomas J Roberts (3 out of 4 patents)

5. Keith P Hoffman (3 out of 3 patents)

6. Tom Roberts (3 out of 3 patents)

7. Douglas A Wielunski (3 out of 3 patents)

8. Vladimir Prive (2 out of 2 patents)

9. Roger K Engel (2 out of 2 patents)

10. Ivan Cramer (1 out of 1 patent)

11. Monserrat Rodriguez (1 out of 1 patent)

12. Arthur A Sagy (1 out of 6 patents)

13. Clay Ladd (1 out of 1 patent)

14. John Ozcomert (1 out of 1 patent)

15. Dave Carroll (1 out of 1 patent)

19 patents: Sort by Forward Citations

1. 12312140 - Package backer card with interlocking article-retaining tabs (2025-05-27),

2. 11352183 - Pressure relief valve with wetting fluid reservoirs (2022-06-07),

3. 10358275 - Pressure relief valve with a plural-part dry strap (2019-07-23),

4. 9821528 - Method for lubricating pressure relief valves (2017-11-21),

5. 9187229 - Oil-less pressure relief valves (2015-11-17),

6. 8820381 - Apparatus and method for tin-tie application (2014-09-02),

7. 8783292 - Oil-less pressure relief valves (2014-07-22),

8. 8636034 - Oil-less and wetted pressure relief valves having an integrated filter (2014-01-28),

9. 8522926 - Apparatus and method for lubricating pressure relief valves (2013-09-03),

10. 8082644 - Apparatus for the application of pressure relief valves (2011-12-27),

11. 7637283 - Pressure relief valve with stiff support (2009-12-29),

12. 7611557 - Reversed pressure relief valve (2009-11-03),

13. 7472524 - Method for the application of pressure relief valves (2009-01-06),

14. 7328543 - Apparatus and method for the application of pressure relief valves (2008-02-12),

15. 7178555 - Pressure relief valve (2007-02-20),

Plitek, LLC is a leading provider of innovative packaging solutions, specializing in the design and manufacturing of flexible packaging products. With a commitment to quality and sustainability, Plitek serves a diverse range of industries, including food, pharmaceuticals, and consumer goods. The company leverages advanced technology and materials to create custom packaging that meets the unique needs of its clients. Plitek's focus on customer satisfaction and continuous improvement has established it as a trusted partner in the packaging industry.

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

Company Badge

USPTO Data Jan 1 1976 - Sep 22 2026

19 Patents

#2 in Prospect Heights, IL

#875 in Illinois

#17,104 in US

#32,571 in the World

Prospect Heights, IL, United States of America

Plitek, LLC

Forward Citations = 213

21 inventors:

Karl K Hoffman (14 out of 15 patents)

Steve Kaganovich (6 out of 7 patents)

Robert C Larsen, Jr (5 out of 5 patents)

4. Thomas J Roberts (3 out of 4 patents)

5. Keith P Hoffman (3 out of 3 patents)

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