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Los Angeles, CA, United States of America

Filtrol Corporation

USPTO Granted Patents = 41

CIPO Patents = 1

Forward Citations = 359

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21 inventors (with patents filed for the assignee):

Dennis N Stamires (25 out of 93 patents)

Hamid Abdel Alafandi (23 out of 23 patents)

John C Lim (8 out of 9 patents)

4. Michael F Brady (5 out of 37 patents)

5. Julius Scherzer (4 out of 14 patents)

6. Masami Kayamoto (3 out of 4 patents)

7. Geoffrey R Wilson (3 out of 4 patents)

8. Anh-Thu Liu (2 out of 2 patents)

9. Mark Conrad Jones (1 out of 29 patents)

10. Robert B Secor (1 out of 1 patent)

11. Robert A Van Nordstrand (1 out of 1 patent)

12. David R Pegg (1 out of 1 patent)

13. Hamid Alifandi (1 out of 1 patent)

14. Dennis R Taylor (1 out of 2 patents)

15. Yih-Yau Sun (1 out of 1 patent)

Core Competencies:

Hydrodesulfurization

Zeolite Catalysts

Silica-Alumina Gels

Attrition Resistant

Pseudoboehmite

FCC Catalyst

Cracking Catalysts

Alumina Pellets

Hydroprocessing

Ammonium Faujasite

Crystalline Aluminosilicate

Catalyst Support

41 patents: Sort by Forward Citations

1. 4388222 - Ni/Co Mo P On titania-alumina hydrodesulfurizing catalyst (1983-06-14),

2. 4362652 - Cracking catalysts containing silica-alumina gels (1982-12-07),

3. 4356113 - Substrates with calibrated pore size and catalysts employing the same (1982-10-26),

4. 4347164 - Mono- and poly-metallic supported catalysts (1982-08-31),

5. 4333857 - Attrition resistant zeolite containing catalyst (1982-06-08),

6. 4332782 - Method of producing pseudoboehmite (1982-06-01),

7. 4325847 - Use of additional alumina for extra zeolite stability in FCC catalyst (1982-04-20),

8. 4325845 - Zeolite catalysts and method of producing the same (1982-04-20),

9. 4313923 - Method of producing pseudoboehmites (1982-02-02),

10. 4310441 - Large pore silica-alumina gels and method of producing the same (1982-01-12),

11. 4297325 - Method of producing pseudoboehmite from aluminum salt solutions (1981-10-27),

12. 4269815 - Method of exchanging sodium zeolite (1981-05-26),

13. 4264474 - Ammoniated silica-alumina gel and catalyst containing the same and (1981-04-28),

14. 4259210 - Crystalline alumino silicate-silica-alumina gel hydrocarbon conversion (1981-03-31),

15. 4253989 - Zeolitic catalyst and method of producing same (1981-03-03),

Filtrol Corporation, based in Los Angeles, CA, specializes in advanced catalyst technologies essential for refining and petrochemical processes. The company focuses on the development and manufacturing of hydrodesulfurization catalysts, zeolite catalysts, and attrition-resistant catalysts, among others. Their expertise extends to silica-alumina gels and pseudoboehmite production, contributing to innovations in hydroprocessing and cracking catalysts. Filtrol's solutions are integral to enhancing efficiency and sustainability in the energy sector.

Profile summary based on public USPTO records.

Company Badge

USPTO Data Jan 1 1976 - Sep 29 2026

41 Patents

#41 in Los Angeles, CA

#1,985 in California

#8,427 in US

#16,669 in the World

Los Angeles, CA, United States of America

Filtrol Corporation

Forward Citations = 359

21 inventors:

Dennis N Stamires (25 out of 93 patents)

Hamid Abdel Alafandi (23 out of 23 patents)

John C Lim (8 out of 9 patents)

4. Michael F Brady (5 out of 37 patents)

5. Julius Scherzer (4 out of 14 patents)

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