The United States Patent and Trademark Office (USPTO) deadlines for pending applications and other proceedings have NOT been continued or stayed in light of COVID-19.
The USPTO is continuing to conduct business with some COVID-19 related modifications:
On March 13, 2020, the Library of Congress and the Copyright Office announced that their facilities will be closed to the public until April 1, 2020. The Copyright Office will otherwise maintain its regular operations and remain open for employees and staff. It too has a dedicated page for notices concerning COVID-19 which may be found here.
Foreign intellectual property agencies have largely remained operational during the COVID-19 pandemic, at least with respect to online or telephone communications and submissions. Many foreign countries have announced extensions to pertinent deadlines as a result of COVID-19. For example, the Canadian Intellectual Property Office announced that deadlines due between March 16, 2020, and March 31, 2020, will be extended until April 1, 2020; the European Patents Office has announced extensions for deadlines due on or after March 15, 2020, until April 17, 2020; and the European Union Intellectual Property Office has granted extensions for deadlines due between March 9, 2020 and April 30, 2020 until May 1, 2020. Many other countries are granting extensions on a case by case basis.