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Philadelphia, PA, United States of America

Pennwalt Corporation

USPTO Granted Patents = 615

Trademarks = 36

Forward Citations = 7,775

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368 inventors (with patents filed for the assignee):

Ronald E MacLeay (43 out of 69 patents)

Vassil S Georgiev (35 out of 41 patents)

Stanley R Sandler (34 out of 51 patents)

4. Chester Stephen Sheppard (31 out of 31 patents)

5. George B Mullen (31 out of 33 patents)

6. Sameeh S Toukan (16 out of 18 patents)

7. Orville L Mageli (16 out of 16 patents)

8. Joseph M Bohen (15 out of 26 patents)

9. Ronald C Griffith (15 out of 45 patents)

10. Walter Kulischenko (14 out of 14 patents)

11. James P King (13 out of 29 patents)

12. Jose A Sanchez (12 out of 38 patents)

13. Ivan Christoff Popoff (12 out of 12 patents)

14. Peter F Radice (11 out of 15 patents)

15. Paul Gordon Haines (11 out of 11 patents)

Core Competencies:

Flame Retardants

Light Stabilizers

Lubricant Additives

Polymer Compositions

Organosulfides

Electrostatic Displays

Photochemical Preparation

Piezoelectric Films

Controlled Release

Alkaline Cleaners

Residual Analyzers

Antihistamines

615 patents: Sort by Forward Citations

1. 5107120 - Passive infrared detector (1992-04-21),

2. 4963607 - Compositions and methods using organosulfides for stabilization of (1990-10-16),

3. 4956494 - Oxidation of thiols, disulfides and thiolsulfonates (1990-09-11),

4. 4954811 - Penetration sensor (1990-09-04),

5. 4954542 - Tetrahalophthalate esters as flame retardants for polybutylene (1990-09-04),

6. 4950364 - Process for the separation of 1,1-dichloro-1-fluoroethane and (1990-08-21),

7. 4944853 - Photochemical preparation of 3-(organothio) aldehydes (1990-07-31),

8. 4938945 - High purity anhydrous FeF.sub.3 and process for its manufacture (1990-07-03),

9. 4938894 - Tetrahalophthalate esters as flame retardants for ABS (1990-07-03),

10. 4937385 - Process for the manufacture of dialkyl disulfides and polysulfides (1990-06-26),

11. 4931019 - Electrostatic image display apparatus (1990-06-05),

12. 4927891 - Polymer bound light stabilizer coating resins (1990-05-22),

13. 4927873 - Halophenyl ester flame retardants for polyphenylene ether resins (1990-05-22),

14. 4926650 - Refrigerant fluid and method of use (1990-05-22),

15. 4925903 - Process of making a polymer containing hindered amine light stabilizing (1990-05-15),

Pennwalt Corporation, based in Philadelphia, PA, specializes in polymer chemistry, focusing on the development and manufacturing of advanced materials. The company is known for its expertise in flame retardants, light stabilizers, and lubricant additives, which are essential for enhancing the performance and safety of various polymer compositions. Additionally, Pennwalt is involved in innovative technologies such as organosulfides, electrostatic displays, photochemical preparation, and piezoelectric films, contributing to diverse applications across multiple industries.

Profile summary based on public USPTO records.

Company Badge

USPTO Data Jan 1 1976 - Oct 6 2026

615 Patents

#6 in Philadelphia, PA

#33 in Pennsylvania

#809 in US

#1,595 in the World

Philadelphia, PA, United States of America

Pennwalt Corporation

Forward Citations = 7,775

368 inventors:

Ronald E MacLeay (43 out of 69 patents)

Vassil S Georgiev (35 out of 41 patents)

Stanley R Sandler (34 out of 51 patents)

4. Chester Stephen Sheppard (31 out of 31 patents)

5. George B Mullen (31 out of 33 patents)

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