In a jolt to US pharma major Abbott Biotechnology, the patent office has set aside its earlier order that granted a patent to the company\u2019s Humira drug, touted to be its blockbuster medicine for treating severe forms of arthritis, on a review petition by Glenmark Pharmaceutical. The patent office was directed by Delhi High Court to review its own decision of granting the patent to Abbott while disposing of an appeal by Glenmark, which alleged that its pre-grant opposition was not considered by the controller while granting the patent. \u201cAfter having considered all the circumstances, representation by way opposition treated as review petition as directed Delhi HC, reply of the applicant, expert evidence, written submissions and arguments made by both parties, I conclude that the impugned invention as disclosed in the specification and claims is obvious to person skilled in the art and hence lacking in inventive step. I am also of the opinion that the description of the invention is also insufficient and ambiguous as described in the specification,\u201d ruled KS Kardam, senior joint controller of patents & designs. Abbott was granted a patent to Humira drug on June 8, 2009. In the meantime, Glenmark had filed a pre-grant opposition on September 4, 2008, which was not brought to the notice of the controller responsible for grant of patents as the documents relating to the said opposition were neither scanned nor uploaded electronically. When Abbott brought to the notice of the controller on July 7, 2009, that a patent has been granted without considering the pre-grant opposition filed by them, the then controller treated the patent letter as cancelled on October 30, 2009. Glenmark filed a writ petition on September 22, 2009, before the Delhi HC against the order of the controller that granted the patent. However, in view of the order dated October 30, 2009, issued by the then controller, the court disposed of the writ petition as infructuous. Abbott also filed a writ petition against the order of the controller\u2019s October 30, 2009, order cancelling the said patent. After considering both the writ petitions the Delhi High Court on September 9, 2010, held that pre-grant opposition filed by Glenmark should be treated as the petition seeking review of decision of the controller to grant patent to Abbott and the order of the controller of October 30, 2009, was also set aside. In the review petition, Glenmark argued that the claims of the impugned application do not constitute an invention under section 2(1)(j) of the Indian Patents Act as they are neither novel nor inventive and lacks industrial application. Glenmark had also brought up Abbott\u2019s earlier Indian patent application to the office\u2019s notice to prove the ground of prior claiming. It stated that Abbott had filed an application for patent on November 27, 2003 and the claims of this application are identical in nature and scope. They alleged that Abbott was seeking two patents for the same invention. Submitting some amended claims, Abbott denied the allegations of Glenmark and stated that while the individual components of the formulations were known in the art, the claimed formulations are pioneering.