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John Krenzer

This inventor holds 71 USPTO granted patents, primarily in Herbicidal Compounds (CPC class 71 9). Top assignees: Velsicol Chemical Corporation, Velsicol Chemical Company, Sandoz Gmbh. Active years: 1976-1988.

USPTO Granted Patents = 71

% Patents Active = 100.0

Average Co-Inventor Count = 1.2

ph-index = 7

Forward Citations = 237(Granted Patents)

Forward Citations (Not Self Cited) = 204(Dec 10, 2025)

Inventors with similar research interests:

Company Filing History:

66 out of 224

Velsicol Chemical Corporation

patents

3 out of 6

Velsicol Chemical Company

US Government as Represented by the Secretary of the Army

patents

Years Active: 1976-1988

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Areas of Expertise:

Herbicidal

Thiadiazolylimidazolidinones

Chemical Agents

Imidazolidinones

Thiazolyl

Oxadiazolidines

Aminoimidazolidinones

Esters

Carbonates

Thienyl

Phenoxy

Pyridyl

71 patents (USPTO):Sort by Forward CitationsExplore Patents

1. 4758263 - 2-(2,5-difluorophenyl)-4-methyl-1,2,4-oxadiazolidine-3,5 diones (1988-07-19),

2. 4677204 - Chemical agents (1987-06-30),

3. 4255182 - Aminosulfonylthiadiazolylureas (1981-03-10),

4. 4190431 - Substituted oxadiazolidine-3,5-diones (1980-02-26),

5. 4167407 - 1-Thiadiazolyl-5-acylimidazolidinones (1979-09-11),

6. 4118390 - 1-Thiazolyl-5-acyloxyimidazolidinones (1978-10-03),

7. 4116969 - 1-Thiazolyl-5-hydroxyimidazolidinones (1978-09-26),

8. 4111949 - Thiadiazolylimidazolidinone esters of tetrahydrofuryl substituted acids (1978-09-05),

9. 4097486 - Herbicidal thiadiazolylimidazolidinone ester (1978-06-27),

10. 4097485 - Thiazolylimidazolidinone esters of furyl and thienyl substituted acids (1978-06-27),

11. 4093443 - Thiadiazolylimidazolidinones (1978-06-06),

12. 4086241 - Benzothiazolylimidazolidinone esters of furyl and thienyl substituted (1978-04-25),

13. 4086240 - 1-Thiazolyl-5-phenoxy and phenylthioalkanoyloxyimidazolidinones (1978-04-25),

14. 4086238 - 1-Thiadiazolyl-4-methoxymethyl-5-hydroxyimidazolidinones (1978-04-25),

15. 4063924 - New thiadiazolylimidazolidinone ester (1977-12-20),

Title: John Krenzer: Pioneering Inventor in Herbicides and Chemical Agents

Introduction:

John Krenzer, a prolific inventor based in Oak Park, IL, has made significant contributions to the field of herbicides and chemical agents. With an impressive portfolio of 71 patents to his name, Krenzer has established himself as a leading innovator in the industry.

Latest Patents:

Among his latest patents is the groundbreaking discovery of 2-(2,5-difluorophenyl)-4-methyl-1,2,4-oxadiazolidine-3,5 diones, a novel class of herbicides that have shown great promise in agricultural applications. Additionally, Krenzer has developed chemical toxic agents with versatile applications, showcasing his prowess in the synthesis of cutting-edge compounds.

Career Highlights:

Krenzer's career has been marked by his tenure at prominent companies such as Velsicol Chemical Corporation and Velsicol Chemical Company. His innovative spirit and dedication to research have led to the implementation of novel solutions in the agricultural and chemical sectors, revolutionizing the way we approach crop protection and chemical synthesis.

Collaborations:

Throughout his career, Krenzer has collaborated with industry experts such as Sidney B Richter and Chin Ching Wu. These partnerships have been instrumental in fostering a culture of innovation and driving forward-thinking research in the field of chemistry.

Conclusion:

In conclusion, John Krenzer stands as a trailblazer in the realm of herbicides and chemical agents, with his inventive spirit and groundbreaking discoveries shaping the landscape of modern agriculture and chemical synthesis. His extensive patent portfolio is a testament to his dedication to pushing the boundaries of scientific inquiry and creating impactful solutions for the world.

Profile summary based on public USPTO records.

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