Ranajit Kumar Bandyopadhyay

Title: Ranajit Kumar Bandyopadhyay: Inventor of a Neem-Derived Compound Isolation Process.

Introduction

Ranajit Kumar Bandyopadhyay is an inventor associated with Kolkata, India, and the Council of Scientific and Industrial Research. His work includes a patented process for isolating an active principle from *Azadirachta indica*, commonly known as neem. The supplied information identifies 1 patent associated with him.

Latest Patents

His listed patent, “Process for the Isolation of an Active Principle from *Azadirachta indica*,” describes a method for isolating a phenolic glycoside from an aqueous neem-bark extract. The compound is reported to inhibit gastric acid secretion and stress-induced gastric ulceration.

The process lyophilises the aqueous extract, extracts the resulting powder with petroleum ether, and treats the insoluble residue with solvents of increasing polarity. The final residue is then processed using high-performance liquid chromatography with a reverse-phase column to isolate the active compound.

Career Highlights

Bandyopadhyay’s documented patent work focuses on natural-product extraction and the isolation of a biologically active compound from neem bark. The patent describes a sequence of extraction and chromatographic steps for obtaining the phenolic glycoside.

Collaborations

The supplied information names Ratna Chatterjee and Uday Bandyopadhyay as Bandyopadhyay’s coworkers. It also associates his work with the Council of Scientific and Industrial Research.

Conclusion

Ranajit Kumar Bandyopadhyay’s listed invention presents a method for isolating a neem-derived phenolic glycoside, reflecting his documented contribution to natural-product research and patent innovation.