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For the Inventor, By the Inventor

Philadelphia, PA, United States of America

Aristech Chemical Corporation


USPTO Granted Patents = 104


Trademarks = 4

Forward Citations = 706

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73 inventors (with patents filed for the assignee):

goldMedal Leonard A Cullo (28 out of 30 patents)

silverMedal Joseph Pugach (17 out of 22 patents)

bronzeMedal Andrew J Sivak (15 out of 15 patents)

4.  Thomas W Smeal (14 out of 14 patents)

5.  George L Brownell (13 out of 13 patents)

6.  Jeffrey S Salek (12 out of 14 patents)

7.  Alain A Schutz (12 out of 12 patents)

8.  Ettore Minghetti (7 out of 12 patents)

9.  John E Eitel (7 out of 7 patents)

10.  Carole L Elias (6 out of 7 patents)

11.  Chandrashekhar P Kelkar (5 out of 5 patents)

12.  Mark R Rubino (5 out of 6 patents)

13.  Edward F Restelli, Jr (4 out of 7 patents)

14.  Francis J Shiring, Iii (4 out of 6 patents)

15.  Virginia Piermattie (4 out of 4 patents)


Core Competencies:
Polyolefin Compositions
Hindered Amine Light Stabilizers
Acrylic Sheet Manufacturing
Low Organic Emission Resins
Thermoformable Acrylic Sheets
Copolymers of Propylene
Hybrid Resin Systems
Transesterification Processes
Hydrotalcite Materials
Plasticizers Production
Catalyst Systems for Rigid Foam
Functional Group Incorporation

104 patents:

1. 6387317 - Process for manufacturing clear shaped articles from polyolefin compositions (2002-05-14),
2. 5990209 - Copolymers of propylene with polymerizable hindered amine light (1999-11-23),
3. 5877354 - Process for making isophorone with improved color and color stability (1999-03-02),
4. 5856491 - Method of making teritiary hindered amines (1999-01-05),
5. 5837177 - Controlled nucleation of polypropylene in biaxially oriented films (1998-11-17),
6. 5821296 - Polyurethane-polyester hybrid resin system having improved stability (1998-10-13),
7. 5814291 - Simplified synthesis of anion intercalated hydrotalcites (1998-09-29),
8. 5780546 - Bisphenol-A based polymers having low organic emissions (1998-07-14),
9. 5763690 - Manufacture of trimethylolpropane (1998-06-09),
10. 5763644 - Method for transesterification (1998-06-09),
11. 5747154 - Acrylic sheet having uniform distribution of coloring and mineral filler (1998-05-05),
12. 5741873 - Low organic emission resins (1998-04-21),
13. 5705552 - Thermoformable acrylic sheet having uniform distribution of color and (1998-01-06),
14. 5688951 - Hindered amine light stabilizer (1997-11-18),
15. 5571863 - Laminating resins having low organic emissions (II) (1996-11-05),
Aristech Chemical Corporation is a leading manufacturer and supplier of high-performance polymer materials. With a focus on innovation, quality, and sustainability, we provide specialty chemicals for various industries, including automotive, building and construction, electronics, and more. Our wide range of products includes acrylic and polymethyl methacrylate (PMMA) materials used in architectural and interior design applications. Through our commitment to customer satisfaction and continuous improvement, we aim to exceed expectations and deliver innovative solutions for our partners worldwide.
This text is generated by artificial intelligence and may not be accurate.

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USPTO Data Jan 1 1976 - Dec 23 2025

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104 Patents

#18 in Philadelphia, PA

#135 in Pennsylvania

#3,522 in US

#7,310 in the World

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Philadelphia, PA, United States of America

Aristech Chemical Corporation

Forward Citations = 706

73 inventors:

goldMedal Leonard A Cullo (28 out of 30 patents)

silverMedal Joseph Pugach (17 out of 22 patents)

bronzeMedal Andrew J Sivak (15 out of 15 patents)

4.  Thomas W Smeal (14 out of 14 patents)

5.  George L Brownell (13 out of 13 patents)

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