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For the Inventor, By the Inventor

New York, NY, United States of America

Gaf Corporation


USPTO Granted Patents = 498


Trademarks = 2

Forward Citations = 5,961

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279 inventors (with patents filed for the assignee):

goldMedal Donald H Lorenz (35 out of 45 patents)

silverMedal Eugene S Barabas (32 out of 34 patents)

bronzeMedal Paritosh M Chakrabarti (26 out of 43 patents)

4.  Louis Schneider (26 out of 26 patents)

5.  Eugene V Hort (25 out of 25 patents)

6.  David E Graham (25 out of 25 patents)

7.  David J Tracy (24 out of 53 patents)

8.  Robert B Login (19 out of 95 patents)

9.  Earl P Williams (17 out of 17 patents)

10.  Michael J Brown (17 out of 18 patents)

11.  Bruce A Gruber (16 out of 34 patents)

12.  Alfredo A Bondoc (13 out of 39 patents)

13.  Kou-Chang Liu (12 out of 57 patents)

14.  Bruce M Resnick (12 out of 12 patents)

15.  Michael W Helioff (11 out of 31 patents)


Core Competencies:
Solar Roofing Assembly
Hydrogenation Catalyst
Cationic Soil Release Polymers
Quaternized Nitrogen Compounds
Permanent Hair Alteration
Epoxy Pyrrolidone Surfactants
Alkoxylated Polyesters
Paint Removing Compositions
Metallic Filament Manufacturing
Defogging Compositions
Water-Soluble Complexes
Asphalt Shingle Manufacturing

498 patents:

1. 4886890 - Diquarternary nitrogen compounds (1989-12-12),
2. 4886609 - Method for stimulation of oil and gas wells (1989-12-12),
3. 4886554 - Solar roofing assembly (1989-12-12),
4. 4885411 - Hydrogenation process for converting lactones to diols (1989-12-05),
5. 4885410 - Hydrogenation catalyst (1989-12-05),
6. 4885319 - Solvent resistant irradiation curable coatings (1989-12-05),
7. 4885158 - Heat stable quaternized lactams having oxylated sulfur anions (1989-12-05),
8. 4883655 - Quaternized nitrogen containing polycyclic compounds (1989-11-28),
9. 4877198 - Device for grounding conductive film (1989-10-31),
10. 4873336 - Process for the preparation of N-vinyl lactams (1989-10-10),
11. 4873294 - Mixture of cationic benzene carboxylate polymers from the reaction of (1989-10-10),
12. 4873003 - Cationic soil release polymers (1989-10-10),
13. 4871535 - Compositions used in permanent structure altering of hair (1989-10-03),
14. 4871483 - Novel non-depositing defoaming compositions (1989-10-03),
15. 4867750 - Alkoxylated polyesters (1989-09-19),
GAF Corporation is a leading roofing and waterproofing manufacturer based in the United States. With a rich history spanning over a century, GAF is renowned for its high-quality roofing materials, innovative solutions, and exceptional customer service. The company offers a wide range of products including shingles, underlayments, ventilation systems, and solar roofing solutions. GAF Corporation is committed to sustainability and has implemented various eco-friendly practices in its manufacturing processes. With a vast network of distributors and contractors, GAF serves both residential and commercial markets, providing reliable and durable roofing solutions.
This text is generated by artificial intelligence and may not be accurate.

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USPTO Data Jan 1 1976 - Dec 30 2025

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498 Patents

#33 in New York, NY

#61 in New York

#941 in US

#1,889 in the World

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New York, NY, United States of America

Gaf Corporation

Forward Citations = 5,961

279 inventors:

goldMedal Donald H Lorenz (35 out of 45 patents)

silverMedal Eugene S Barabas (32 out of 34 patents)

bronzeMedal Paritosh M Chakrabarti (26 out of 43 patents)

4.  Louis Schneider (26 out of 26 patents)

5.  Eugene V Hort (25 out of 25 patents)

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