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For the Inventor, By the Inventor

Slatersville, RI, United States of America

Polytop Corporation


USPTO Granted Patents = 38



Forward Citations = 1,121

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16 inventors (with patents filed for the assignee):

goldMedal Clifford Wayne Skillin (13 out of 48 patents)

silverMedal Robert E Hazard (12 out of 14 patents)

bronzeMedal Woodrow S Wilson (7 out of 7 patents)

4.  Sergey Romanov (6 out of 19 patents)

5.  Patrick J Brannon (6 out of 34 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)


Core Competencies:
Dispensing Closure
Child Resistant
Tamper Evident
Flexible Holder
Living Hinge
Flow Conduit
Molded Plastic
Spray Dispenser
Hinged Lid
Sealing Element
Rigid Dip Tube
Positive Alignment

38 patents:

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 specialized manufacturer based in Slatersville, Rhode Island, focusing on advanced polymer solutions. The company develops innovative products for various industries, including automotive, medical, and consumer goods, emphasizing durability and performance. With a commitment to research and development, Polytop leverages cutting-edge technology to enhance product functionality and meet the evolving needs of its clients. Its expertise in polymer science positions it as a key player in the materials sector.
Profile summary based on public USPTO records.

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USPTO Data Jan 1 1976 - Oct 6 2026

Polytop Corporation
38 Patents

#1 in Slatersville, RI

#56 in Rhode Island

#9,020 in US

#17,831 in the World

Slatersville, RI (US)
Slatersville, RI, United States of America

Polytop Corporation

Forward Citations = 1,121

16 inventors:

goldMedal Clifford Wayne Skillin (13 out of 48 patents)

silverMedal Robert E Hazard (12 out of 14 patents)

bronzeMedal Woodrow S Wilson (7 out of 7 patents)

4.  Sergey Romanov (6 out of 19 patents)

5.  Patrick J Brannon (6 out of 34 patents)

Please report any incorrect information to [email protected]
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