Tuesday, January 16, 2024 3:28:05 PM
https://www.uspto.gov/learning-and-resources/fees-and-payment/uspto-fee-schedule#Patent%20Maintenance%20Fee
I see that you didn't know the patent owner needs to pay scheduled maintenance fees. That's OK, there's no shame in ignorance, unless maybe you are the CEO of a publicly traded company that owns those patents as their only protected Intellectual Property.
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