U.S. Patent Office Notifies EnviroScrub: First Two Patent Applications are Allowed for Issuance as Patents 7 February, 2003 Minneapolis, MN On 4 October, 2002, and 31 January, 2003, the United States Patent and Trademark Office (USPTO) mailed Notices of Allowance to EnviroScrub Technologies Corporation. Each Notice officially advised that an EnviroScrub patent application "has been examined and is allowed for issuance as a patent." In these two Notices of Allowance, the USPTO accepted a combined total of 105 claims. The two applications should issue as two separate patents early this year. The allowed claims cover various embodiments of EnviroScrub's Pahlman™ Process which is essentially a closed-loop system comprised of two discrete steps. One step involves the capture of target pollutants, such as NOx, SOx, mercury compounds, elemental mercury and particulates, in real-time from exhaust gas streams using Pahlmanite™ dry mineral sorbent compounds. The other step involves the regeneration of the spent or partially spent sorbent compounds for reuse and separation and isolation of useful by-products such as nitrates and sulfates for use in fertilizers and industrial chemicals. The subject matter of the claims includes both single- and dual-stage dry removal systems and processes utilizing EnviroScrub's Pahlmanite™ sorbent compounds. Some of the claims cover the electronic controls that allow for automation and that regulate system and process parameters to assure that target pollutants are removed at ranges of high removal efficiencies achievable. There are claims directed to the capture of specific target pollutants such as NOx, SOx, mercury compounds, elemental mercury, and particulates, either in single- or dual-stage removal. Additionally, the embodiments of EnviroScrub's method of regenerating spent Pahlmanite™ sorbent compounds for reuse and production of useful and marketable by-products are also covered in the allowed claims. The imminent issuance of EnviroScrub's first two granted U.S. patents represents a critical milestone for the company. With a portfolio of patent-protected technology in hand, EnviroScrub will have an increased likelihood to participate substantially in the over $9 billion spent annually worldwide on capital expenditures for NOx, SOx, and mercury control. As part of its strategy to build competitive advantage through intellectual property protection, EnviroScrub has followed up its U.S. patent applications with patent filings in many other countries and regions of the world. EnviroScrub, a privately-held deployment-stage company, based in Minneapolis, Minnesota, licenses its dry Pahlman™ Process technology, which is proven to be exceptionally effective in removing NOx ,SOx, H2S, mercury, and other heavy metals from the gaseous emissions of natural gas- and coal- fired boilers and other industrial processes. EnviroScrub plans to compete in the multi-billion dollar global emissions-reduction-technology ("ERT") market beginning in 2003.   Back to News

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