Company Filing History:
1 out of 329 
1 out of 756 
1 out of 57 Years Active: 1976-1984
Title: The Innovative Contributions of Han San Ku
Introduction
Han San Ku is a notable inventor based in Painesville, OH (US). He has made significant contributions to the field of plant growth regulation through his innovative patents. With a total of 3 patents, his work has garnered attention for its practical applications in agriculture and horticulture.
Latest Patents
One of Han San Ku's latest patents involves fluorenecarboxylic acid derivatives. This series of ester and salt derivatives of fluorene-9-carboxylic acid and fluorene-1-carboxylic acid exhibit significant plant growth regulating properties. These compounds are useful in controlling the size, shape, dormancy time, flowering time, and/or fruit setting of plants, depending upon the concentrations used. They may also be used to control the growth rate, texture, and color of turf grass. Presently preferred compounds include the cis-2,5-dimethylpyrrolidine salt of 1-fluorenecarboxylic acid, 9-cis-2,5-dimethyl-1-pyrrolidinyl-2-chlorofluorene-9-carboxylic acid, methyl ester, the 2,6-dimethylpiperidine salt of 1-fluorenecarboxylic acid, and the cis-2,5-dimethylpyrrolidine salt of 9-hydroxyfluorene-9-carboxylic acid. Another significant patent focuses on increasing chloroethylphosphonic acid-induced ethylene response. This composition, consisting essentially of 2-chloroethylphosphonic acid and certain imides, carbamates, or tetrachloroisophthalonitrile, enhances the ability of 2-chloroethylphosphonic acid to cause the release of ethylene in plant tissue when applied.
Career Highlights
Throughout his career, Han San Ku has worked with prominent companies such as Diamond Shamrock Corporation and Allied Chemical Corporation. His experience in these organizations has contributed to his expertise in the field of plant growth regulation.
Collaborations
Han San Ku has collaborated with notable individuals in his field, including Robert E Holm and William J Pyne. These collaborations have likely enriched his research and development efforts.
Conclusion
Han San Ku's innovative
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