Scientific Design Company, Inc. is known for developing and producing chemical products. The Company provides ethylene oxide, maleic anhydride, and dehydration catalyst. Scientific Design markets its commodities throughout the world.
In India the pharmaceutical business of Scientific Design Company, Inc. focuses on the Epoxidation process, Glycol ether process, System and method for monitoring a process, Epoxidation on a process with an added moderator, and Epoxidation process with post-conditioning step.
Scientific Design Company, Inc. filed a patent application numbered 201717031043 that is titled SILVER CATALYSTS WITH IMPROVED SIZE AND DISTRIBUTION DENSITY OF SILVER PARTICLES. The patent has been filed in the field of Chemicals. This Patent Application has been granted as Patent Number 356939. This invention relates to a silver-based ethylene epoxidation catalyst comprising greater than about 20 % by weight of silver disposed on an alpha-alumina carrier; and a promoting amount of one or more promoters disposed of on said the alpha-alumina carrier, wherein said silver is present on said alpha-alumina carrier as silver particles, said silver particles having a diameter of greater than about 150 nm and having a distribution density of about 20 particles per 1 square micron or less.
During the patent examination, the Patent Examiner raised objections under Section 3(d) of the Indian Patents Act, 1970 (as amended). It was pointed out that the subject matter of claims relates to a known process for the vapor phase conversion of ethylene to ethylene oxide which does not involve any synergistic effects.
As a response, the Applicant submitted that the invention deals with the problem of selectivity and activity decline of a silver-based ethylene epoxidation catalyst overtime through controlled modifications of size and distribution density of silver particles on an alpha-alumina carrier. Therefore, as the method/process is not known, the invention cannot fall under Section 3(d) of the Act.
Advocate Rahul Dev is a Patent Attorney & International Business Lawyer practicing Technology, Intellectual Property & Corporate Laws. He is reachable at rd (at) patentbusinesslawyer (dot) com & @rdpatentlawyer on Twitter.
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