In April, 1996, Hans Hoff invented an invisible Teflon coating for silk that could be used in men's ties so stains would wipe off easily. In May, 1996, Geraint Wynn-Ffolkes independently invented the same coating, and was granted a patent for it
Hans wants to attack the patent. Which of the following is true?
A) There are no grounds to attack a patent. Once it is granted that is final.
B) A patent can be impeached but Hans will not be successful because Geraint registered first.
C) A patent can be impeached and Hans will be successful because he invented the coating first.
D) A patent can be impeached and Hans will be successful because the matter was not the proper subject matter for a patent.
E) It is too late to impeach the patent. Hans should have opposed Geraint's application.
B
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