How does the USPTO handle hazardous or dangerous materials submitted as exhibits?

This page is an FAQ based on guidance from the Manual of Patent Examining Procedure. It is provided as guidance, with links to the ground truth sources. This is information only: it is not legal advice.

The USPTO has specific procedures for handling hazardous or dangerous materials submitted as exhibits:

• Such materials are not accepted for retention by the Office.
• The Office will immediately dispose of these materials upon discovery.
• Applicants are advised against submitting hazardous or dangerous materials.

According to MPEP 608.03(a): No substances or materials considered hazardous or dangerous to Office personnel, will be accepted.

If an applicant needs to demonstrate properties of hazardous materials, they should consider alternative methods, such as detailed descriptions, simulations, or non-hazardous substitutes.