Dibrugarh: Assam Agricultural University (AAU), Jorhat, has been granted a patent for a novel lac resin-based edible coating that improves the shelf life and storability of Assam lemon, a fruit known for its distinct flavour and cultural importance in the region but limited by its short post-harvest life.The patent, titled “A Novel Lac Resin-Based Edible Coating to Improve Shelf Life and Storability of Assam Lemon and the Process of Making Thereof,” was granted on July 3 by the patent office, Govt of India, under the Patents Act, 1970. The application was filed on Oct 5, 2023, and the patent wasapproved for a 20-year term.The technology was developed by AAU researchers Dr Purnima Das, Dr Priyanka Saikia, Dr Archana Moni Das, Dr LK Hazarika, Dr Surajit Kalita and Dr Soumitra Goswami. It uses lac resin, a natural biopolymer, to create a protective edible layer around the fruit that slows moisture loss, delays spoilage and reduces microbial degradation, offering farmers and traders a sustainable, chemical-free alternative to conventional preservation methods.“This patent is a proud moment for the university. This coating is the result of years of research aimed at solving a very practical problem faced by our farmers. Assam lemon has tremendous commercial and export potential, but its short shelf life has always been a barrier. We believe this technology can change that. What makes this coating special is that it is entirely edible and biodegradable. It aligns with the growing global demand for safe, sustainable post-harvest solutions,” an AAU spokesperson said.Officials said the technology could be scaled up for commercial use, which may create new opportunities for farmers cultivating Assam lemon and improve its marketability in domestic and overseas markets.
The application was filed on Oct 5, 2023, and the patent for a novel lac resin-based edible coating was approved for a 20-year term
