Location History:
- Runcorn, EN (1976 - 1978)
- Altrincham, GB (1981)
- Runcorn, GB (1979 - 1982)
- Manchester, GB (1980 - 1985)
- Cheshire, GB (1981 - 1985)
Company Filing History:
Years Active: 1976-1985
Title: John Crosby: A Pioneer in Insecticide Innovations
Introduction
John Crosby, an accomplished inventor based in Manchester, GB, has made significant contributions to the field of chemistry and insecticide development. With 14 patents to his name, Crosby's work focuses on innovative processes that enhance the effectiveness and handling of insecticides.
Latest Patents
Among his notable inventions, one stands out: the process for the preparation of cyclopropane carboxylic acid esters, specifically the compound 3-(2'-chloro-3',3',3'-trifluoropropenyl)-2,2-dimethylcyclopropane-1-carboxylic acid esters. This innovative technique involves the dehydrohalogenation of the corresponding 3-(2',2'-dichloro-3',3',3-trifluoropropyl) compounds through a reaction with an alkali metal carbonate in a polar aprotic solvent. The resulting products serve as valuable intermediates in the preparation of pyrethroid insecticides or function as insecticides themselves. Additionally, Crosby has developed a novel crystalline modification of an enantiomeric pair of isomers of the insecticide cyhalothrin, which boasts improved handling characteristics for increased efficiency in pest control.
Career Highlights
Crosby has spent his career at Imperial Chemical Industries Limited, where he has been at the forefront of developing cutting-edge agricultural chemicals. His expertise in chemistries related to insecticide formulations has positioned him as a key figure in the industry.
Collaborations
Throughout his career, John Crosby has collaborated with notable coworkers, including Robert Allan Rennie and Robert Michael Paton. Together, they have contributed to advancements in the insecticide sector and have played a vital role in enhancing product formulations.
Conclusion
John Crosby's innovative spirit and dedication to improving pest control through chemical inventions have earned him a respected place among inventors in the field. His numerous patents reflect a commitment to creating practical solutions that not only address agricultural challenges but also prioritize handling and efficiency. As the world continues to face pest-related issues, Crosby's contributions will undoubtedly leave a lasting impact on agricultural practices.