Maintenance of patents is the payment of fees to maintain the right in force.

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Failure to pay maintenance fees

If an inventor submits an idea and it has been accepted, and he makes no tangible device (it remains intellectual rather than carried out). But then the inventor does not pay the maintenance fees, ...
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Can the patent be revived EP 0639878 B1

This patent on the legal events shows it has ceased on the 22 Jan 2009. Can this be revived by paying the fees. Also how long are patent granted for 15 years or 20 years and is this from the date o ...
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Prior Art for Method And System For Improved Network Maintence Scheduling

Application # 20120173688 Primary Filing Category-Telecommunications-455 The system is designed to coordinate planned maintenance on a network in order to prevent collisions and duplicated work ...