Understanding Post-dating and Anti-dating in Patent Applications

Post-dating refers to the practice of changing the filing date of a patent application to a later date. Anti-dating is the opposite—it refers to manipulating the filing date backward.

What is Post-dating?

In India, post-dating allows applicants to request a later date for the patent filing, typically within six months of the original filing date.

Reasons for post-dating:

• Extra time for refining the invention
• Additional time for completing the patent documentation
• Correcting formalities or technical issues

What is Anti-dating?

Anti-dating is the opposite of post-dating—it refers to manipulating the filing date backward. This is generally illegal because it can mislead the patent office.

Laws on Post-dating and Anti-dating in Other Countries

• United States: Post-dating not explicitly allowed; Anti-dating is illegal
• European Union (EPO): Post-dating allowed in limited circumstances; Anti-dating prohibited
• United Kingdom: Post-dating allowed under certain conditions; Anti-dating prohibited
• Australia: Post-dating can be allowed; Anti-dating strictly prohibited
• Japan: Post-dating provisions exist; Anti-dating illegal