Intellectual Property India has published a patent application (2672/DEL/2009 A) filed by Luminous Power Technologies Pvt. Ltd., New Delhi on Dec. 21, 2009 for a 'float valve for lead-acid battery.'
The application for the patent - which was invented by Bhaskar Bishnu and Ashis Kumar Ghosh - was published on 23 August under issue no. 34/2013.
According to the abstract released by the Intellectual Property India: "The invention relates to a cap assembly for a lead acid battery.
“More particularly the invention relates to a cap assembly wherein the electrolyte level in a cell of the lead acid battery can be estimated from the outside."