0

In reference to the patent: US5222141

1 Answer 1

0

Maintaining a patent costs money. Those fees have to be paid regularly or the patent "dies".

2
  • So this is what is occurring? Sep 11, 1996 FPAY Fee payment Year of fee payment: 4 Sep 29, 2000 FPAY Fee payment Year of fee payment: 8 Sep 29, 2004 FPAY Fee payment Year of fee payment: 12
    – M Killian
    Commented Dec 14, 2016 at 20:06
  • Yes, that means that the fees were paid.
    – user18033
    Commented Dec 14, 2016 at 20:09

You must log in to answer this question.

Not the answer you're looking for? Browse other questions tagged .