Categories Glossary Window Open Post author By faq Post date 2020-06-24 No Comments on Window Open time period when a maintenance fee can be paid with or without a surcharge. — see MPEP 2506 Related posts: Maintenance Fees Window Close What happens when the last day of the six-month period from the claimed priority date is a date when the Office of origin is not open? Time for Reply and Abandonment ← Window Close → WINS Leave a Reply Cancel replyYour email address will not be published. Required fields are marked *Comment Name * Email * Website Save my name, email, and website in this browser for the next time I comment.