The Indian Sugar and General Engineering Corporation, a Haryana-based company, has won an American patent for a technique which improves the safety standards of cylinders meant for carrying liquefied gases.

Known in trade circles as containers or tonners, these cylinders are used for transporting hazardous gases, such as chlorine, sulphur dioxide and ammonia.

The patent has been granted by the United States Patent and Trademark Office. The Indian Sugar and General Engineering Corporation is the world's largest manufacturer of such cylinders. It exports two-thirds of its production to over 30 countries.