1836 U.S. Patent Office fire

1836 U.S. Patent Office fire

Blodget's Hotel with stagecoach parked in front, in around 1800s—before 1836 Great Fire
Date	December 15, 1836 (1836-12-15)
Location	U.S. Patent Office, Blodget's Hotel, Washington, U.S.
Outcome	Entirety of the library lost (except one volume)

The 1836 U.S. Patent Office fire was the first of two major fires the U.S. Patent Office has had in its history. It occurred in Blodget's Hotel building, Washington on December 15, 1836. An initial investigation considered the possibility of arson due to suspected corruption in the Post Office, which shared the same building, but it was later ruled out. The cause was ultimately determined to be accidental. The fire is considered to be a unique point in the historical events of the Patent Office that caused policy changes.

Local fire suppression efforts were incapable of preventing the damage due to lack of fire personnel and proper equipment. Many patent documents and models from the preceding three decades were irretrievably lost. As a result of the fire, Congress and the newly legally revamped Patent Office changed the way it handled its record keeping, assigning numbers to patents and requiring multiple copies of supporting documentation.