What is the difference between an ‘allowed’ application and an application ‘in issue’?

According to the MPEP, there is no substantial difference between an ‘allowed’ application and an application ‘in issue’. The MPEP uses these terms interchangeably: “An ‘allowed’ nonprovisional application or an application ‘in issue’ is one which has been examined and determined to meet all statutory requirements, and in which a notice of allowance has been…

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