Mr. Photis-Peter-Pascali, first let me say that I am uneducated in patent applications. 
Two months ago I asked the CEO of HPQ what will be done concerning our PURVAP patents showing that it is Deemed to be withdrawn and the the patents office is waiting for a reply. I was also told that he reached out to both Pyrogenisis and his patent agent and that I shouldn't worry because Mr. Tourillon stated,

Dear Saint,

What I can say is that there is nothing significant to report in the latest update, we are still in a questions and answers phase, as we previously reported.

For internal reasons, on September 13, 2019, we submitted a "maintenance of applications" filing requesting more time before submitting a "written opinion".

Requesting a delay does trigger the issuance of new filling that states « Application deemed to be withdrawn (non-reply to Written Opinion) ».   As we will submit the opinion before the end of the extension, this not issue.

For peoples not accustomed to the patent process, seeing such a comment may be seen as something negative, but as I have explained, it all part of the process.  

Rest assured that before replying, I took the time to double-check with PyroGenesis and our Patent agent.

Hope this answers your question

Regards

Bernard Tourillon

President and CEO