What is the difference between a petition under 37 CFR 1.137(a) and 37 CFR 1.137(b)?

What is the difference between a petition under 37 CFR 1.137(a) and 37 CFR 1.137(b)? The main difference between petitions under 37 CFR 1.137(a) and 37 CFR 1.137(b) lies in the circumstances of abandonment and the requirements for revival: 37 CFR 1.137(a): For unintentional abandonment. Requires a statement that the entire delay was unintentional. 37…

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