I would like to know how is the status of patent number US 4396600? I read that this patent was reexamined in 1986 and I wonder why this patent was canceled since I didn't see any justification writing inside.
What I mean when the examiner said that the clains 1-23 are cancelled? Is it represent that all the patent was cancelled?
Thank you in advance!
Leandro M. Z. Scapin