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For the Inventor, By the Inventor

Schodack, NY, United States of America

Chester J Opalka, Jr

This inventor holds 28 USPTO granted patents, primarily in Pyridine Chemistry. Top assignee: Sterling Drug Inc.. Active years: 1978-1988.

IDiyas Innovation Intelligence. (2026). Inventor Profile: Chester J Opalka, Jr. Retrieved from https://idiyas.com/inventor/chester-j-opalka-jr

Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile

USPTO Granted Patents = 28

% Patents Active = 100.0

Average Co-Inventor Count = 2.6

ph-index = 9

Forward Citations = 327(Granted Patents)


Location History:

  • Rensselaer, NY (US) (1981)
  • Schodack, NY (US) (1978 - 1988)

Company Filing History:

goldMedal28 out of 692 
 
Sterling Drug Inc.
 patents

Years Active: 1978-1988

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Areas of Expertise:
Pyridinones
Steroids
Cardiotonic
Imidazo
Amino Compounds
Hydroxy Compounds
Sulfonylsteroids
Nicotinamides
Production Processes
Pyridine Derivatives
Dihydro Compounds
Acylamino
28 patents (USPTO):Explore Patents
1. 4755595 - Enhanced production of 4,5-unsaturated steroids utilizing methanol (1988-07-05),
2. 4684636 - Antiandrogenic sulfonylsteroidopyrazoles and processes for preparation (1987-08-04),
3. 4599423 - Preparation of 5-(hydroxy- and/or (1986-07-08),
4. 4559352 - 1,2-Dihydro-2-oxo-5-(hydroxy-and/or amino-phenyl)-nicotinonitriles and (1985-12-17),
5. 4515797 - 3-Amino-5-(hydroxy- and/or (1985-05-07),
6. 4465686 - 5-(Hydroxy- and/or amino-phenyl)-6-(lower-alkyl)-2-(1H)-pyridinones, (1984-08-14),
7. 4463008 - 2-Alkoxy-5-(pyridinyl)pyridines and cardiotonic use thereof (1984-07-31),
8. 4420617 - 5(Pyridinyl)pyridin-2-amines (1983-12-13),
9. 4391811 - 2-Amino-6-(pyridinyl)-3H-imidazo[4,5-b]pyridines and their cardiotonic (1983-07-05),
10. 4374141 - 2-Substituted amino-5-(pyridinyl)-nicotinamides and their cardiotonic use (1983-02-15),
11. 4362734 - 2-(Substituted-amino)-5-(pyridinyl-nicotinonitriles, and their (1982-12-07),
12. 4351941 - Pyridinyl-pyridines (1982-09-28),
13. 4331672 - 5-(Pyridinyl)pyridine-2-hydrazines, their preparation and their (1982-05-25),
14. 4312875 - 5-(Pyridinyl)-6-(lower-alkyl)-2(1H)-pyridinones, (1982-01-26),
15. 4309537 - Production of imidazo[4,5-b]pyridin-2-ones or thiones (1982-01-05),

Title: Chester J Opalka, Jr: A Pioneer in Steroid Chemistry

Introduction

Chester J Opalka, Jr, based in Schodack, NY, is an accomplished inventor known for his significant contributions to the field of steroid chemistry. With an impressive portfolio of 28 patents, Chester has dedicated his career to innovative research and development, particularly focusing on the enhancement of steroid production and application.

Latest Patents

Among his latest inventions, two notable patents stand out. The first is titled "Enhanced production of 4,5-unsaturated steroids utilizing methanol." This patent reveals an innovative method for improving the epoxidation of specific 4,5-unsaturated steroids with peracetic acid, achieved by conducting the reaction in a methanol solution. The second patent, "Antiandrogenic sulfonylsteroidopyrazoles and processes for preparation," describes 1'-sulfonylsteroido[3,2-c]pyrazoles, including compounds such as (5.alpha.,17.alpha.)-1'-(methylsulfonyl)-1'H-pregn-20-yno[3,2-c]pyrazol-17-ol, which are identified as valuable antiandrogenic agents. This patent also covers their preparation processes, methods of use, and various compositions involving these compounds.

Career Highlights

Chester currently holds a significant position at Sterling Drug Inc., where he has the opportunity to advance his research and apply his inventive solutions to real-world pharmaceutical challenges. His extensive experience in the pharmaceutical industry has allowed him to remain at the forefront of steroid research.

Collaborations

Throughout his career, Chester has collaborated with esteemed colleagues including George Y Lesher and Donald F Page. These partnerships have facilitated groundbreaking advancements in steroid chemistry and have contributed to the overall success of their projects.

Conclusion

Chester J Opalka, Jr's innovative spirit and technical expertise have made him a renowned figure in the field of steroid chemistry. His contributions through various patents exemplify his commitment to scientific advancement and improving health outcomes through his work in pharmaceuticals. As he continues to innovate, the impact of his inventions is poised to shape the future of steroid applications.

Profile summary based on public USPTO records.
Data Sources: USPTO Patent Grant XML, Patent Center, EPO & CIPO • Normalized by IDiyas Innovation Graph. Methodology & provenance architecturePlease report any incorrect information to [email protected]
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