SSI PTFE Coated EPDM Membrane Diffusers
By: Tom Frankel
Post Date: August 19th 2008
We have been asked why two other companies are offering “PTFE Coated” membrane diffusers for sale, when SSI has filed so many patents covering this technology and SSI clearly invented this field. SSI filed patents on coated fine bubble diffuser technology starting in 2004, and two more times in 2005, and yet again in 2008.
In the United States, between the time a patent is applied for and granted, it is called a Pending Patent. A Pending Patent in the US has no rights. However once an patent is granted and claims are established by the US Patent and Trademark Office, the owner of the patent is granted exclusive rights to that technology.
At this time, one patent has been granted and two further patents are being reviewed presently by the US Patent Office. Hence we have little to no rights to patent protection for now, though this, we believe, is a temporary situation.