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Provisional patent application India | Sample of Patent Granted in India to Paul Wurth S.A.

Provisional patent application india: Indian Patent number 275452  titled “METHOD FOR PRODUCING PULVERIZED COAL“ has been granted by the Indian Patent Office to Paul Wurth S.A. for Indian patent application number 8477/DELNP/2010 filed on 02/06/2009 before the Indian Patent Office. The granted patent in India was published in journal on 9th September,2016

The granted patent relates to method for producing pulverized coal, the method comprising the steps of heating a drying gas, preferably an inert gas, in a hot gas generator (26) to a predefined temperature; feeding the heated drying gas into a pulverizer (20); introducing raw coal into the pulverizer (20), the pulverizer (20) grinding the raw coal into pulverized coal; collecting a mixture of drying gas and pulverized coal from the pulverizer (20) and feeding the mixture to a filter (34), the filter (34) separating the dried pulverized coal from the drying gas; collecting the dried pulverized coalfor further use and feeding the drying gas from the filter (34) to a recirculation line (38) for returning at least part of the drying gas to the hot gas generator (26); and determining an oxygen level in the drying gas, preferably in the recirculation line (38), and comparing the determined oxygen level to a predetermined oxygen level threshold.

According to a preferred embodiment of the invention, if the determined oxygen level is higher than a predetermined oxygen threshold, water is injected into the heated drying gas before it is fed into the pulverizer (20), the volume of water injected being calculated so as to reduce the oxygen level below the predetermined oxygen level threshold. The patent has been published under section 43(2) of the Indian Patent Act. Any person interested can oppose the patent under Section 25(2) within one year from the date of grant of patent.

Paul Wurth S.A. Intellectual Property Status in India

Provisional patent application india: Till date Paul Wurth S.A. has filed 175 patents in India, out of which 125 patent applications have been published and 50 have been granted by the Indian Patent Office

Patent Status of the Paul Wurth S.A. Globally

Main International Patent Classifications (IPCs) Identified 

International Patent Classifications (IPCs) are used to classify patents and sort them into different classes according to the domain of the invention. Particularly, the IPC is a hierarchical patent classification system used in over 100 plus countries across the globe to classify the description of patents in a uniform manner. Most of the research done by the R& D department of PAUL WURTH S.A.  is in C21B. C21B relates to MANUFACTURE OF IRON OR STEEL Almost 175+ patents have been filed in this IPC.

Other active IPCs are F27B and F27D.  F27B relates to FURNACES, KILNS, OVENS, OR RETORTS IN GENERAL; OPEN SINTERING OR LIKE and F27D relates to DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS, OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE.

Main Inventors

Patent Filing Trends over the years. Step  1 could be filing provisional patent application India

Paul Wurth S.A. started filing patents from the year 2006. Most number of patents about 25+ were filed in the year 2010.  From the year 2011 to 2014 25+ patents were filed before the WIPO authority. However, in the year 2016 about 8+ PCT patent applications have been filed till date.
Number of Patents Filed in Different Countries identified 

Most number of patents have been filed in United States which is about 300 followed by filing it before PCT and Spain.  Comparatively less number of patents have been filed as PCT patent applications which is about 200. The company is active in protecting its intellectual property activities in countries like Canada, European Patent Office and South Africa.

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