What is the "Fee payment" as described in the Legal section at the end?

Question

In reference to the patent: US5222141

DonQuiKong · Accepted Answer · 2016-12-14 20:05:22Z

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

answered Dec 14 '16 at 20:05

DonQuiKong

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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
Dec 14 '16 at 20:06
Yes, that means that the fees were paid.
– DonQuiKong
Dec 14 '16 at 20:09

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