Gain Technologies Inc. said the U.S. Patent Office has reaffirmed the rejection of a U.S. patent issued in 2004 for Cinpres Gas Injection Ltd.'s plastic expulsion process, or PEP - as the showdown continues between suppliers of gas-assisted molding technology.
Cinpres of Middlewich, England, will appeal the ruling, said a company spokesman.
Meanwhile, Cinpres has closed its U.S. headquarters in Ann Arbor, Mich. The Cinpres spokesman said the company has decentralized its operation by having officials work out of their home offices. Distribution and spare parts are handled out of an office in the Columbus, Ohio, area.
Gain of Shelby Township, Mich., near Macomb, is heralding the patent ruling as a victory in the battle of Gain's ``overflow well'' process vs. Cinpres and its PEP. Both methods are used to handle excess resin forced out of the mold cavity during gas-assisted injection molding, a process that creates hollow parts by pumping gas, or a fluid, into the filled mold.
According to Gain, the patent office first rejected claims of the Cinpres patent March 2. This latest reaffirmation of the rejection took place Sept. 12, and Gain announced the news in early October.
The matter ``is presently in a state of robust rebuttal,'' the Cinpres spokesman said. ``We've put together a legal rebuttal, which the patent office is reviewing,'' he said, adding that Cinpres is not making a detailed statement right now.