For the Inventor, By the Inventor

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Slatersville, RI, United States of America

Polytop Corporation

USPTO Granted Patents = 38

CIPO Patents = 9

EPO Patents = 2

Trademarks = 1

Forward Citations = 1,086

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20 inventors (with patents filed for the assignee):

Clifford Wayne Skillin (13 out of 48 patents)

Robert E Hazard (12 out of 14 patents)

Woodrow S Wilson (7 out of 7 patents)

4. Sergey Romanov (6 out of 19 patents)

5. Patrick J Brannon (6 out of 32 patents)

6. Donald La Vange (3 out of 3 patents)

7. Joseph E Johnson (2 out of 4 patents)

8. Donald LaVange (2 out of 2 patents)

9. Joseph F Johnson (1 out of 1 patent)

10. Steven B Wilson (1 out of 1 patent)

11. Donald H Lavange (1 out of 1 patent)

12. Ray Peters (1 out of 1 patent)

13. Edward D O'Brian (1 out of 15 patents)

14. Herbert Erichson (1 out of 1 patent)

15. Dennis A Haggerty (1 out of 1 patent)

38 patents: Sort by Forward Citations

1. 8302824 - Dispensing closure having a flow conduit with key-hole shape (2012-11-06),

2. 7980432 - Dispensing closure having a flow conduit with key-hole shape (2011-07-19),

3. D629685 - Dispensing closure (2010-12-28),

4. D621260 - Dispensing closure (2010-08-10),

5. 7762438 - Dispensing closure with latch back (2010-07-27),

6. 7735699 - Dispensing closure having a flow conduit with key-hole shape (2010-06-15),

7. 7637402 - Dispensing cap with center channel and helical flow profile (2009-12-29),

8. 7322493 - Dispensing closure having complete peripheral seal (2008-01-29),

9. 7314150 - Dispensing closure with cap structure having dual living hinges (2008-01-01),

10. 7128227 - Dispensing closure with stop wall for positive alignment on container (2006-10-31),

11. 6050459 - Rigid dip tube connector for a liquid spray dispenser (2000-04-18),

12. 5890633 - Two component, molded plastic dispenser operating on push-pull principle (1999-04-06),

13. 5542585 - Dispensing closure with pivotably mounted spout and means for limiting (1996-08-06),

14. 5524799 - Dispensing closure employing standards with bearings to receive spout (1996-06-11),

15. 5356044 - Tamper evident seal for dispensing closure (1994-10-18),

Polytop Corporation is a leading global provider of polymer-based solutions. With over 50 years of experience, we specialize in developing and manufacturing high-performance polymers for various industries, including automotive, aerospace, electronics, and more. Our innovative materials are designed to meet the evolving needs of our customers and deliver exceptional performance, durability, and sustainability. Visit our website to learn more about our wide range of polymer products and solutions.

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

Company Badge

USPTO Data Jan 1 1976 - Dec 2 2025

38 Patents

#1 in Slatersville, RI

#51 in Rhode Island

#8,716 in US

#17,275 in the World

Slatersville, RI, United States of America

Polytop Corporation

Forward Citations = 1,086

20 inventors:

Clifford Wayne Skillin (13 out of 48 patents)

Robert E Hazard (12 out of 14 patents)

Woodrow S Wilson (7 out of 7 patents)

4. Sergey Romanov (6 out of 19 patents)

5. Patrick J Brannon (6 out of 32 patents)

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