Validity/Invalidity Search – Understanding and Approach

Purpose of Validity/Invalidity Search

Determine whether a patent already obtained on invention is valid or not Validity of patent can be challenged during whole lifetime of patent (and under certain circumstances even after it has been lapsed) by filing opposition, re-examination, or invalidity action, etc.

Time Range for Searching

• In general, all literature published before priority date of the patent to be invalidated should be searched

• Grace period for public disclosure

12 months for US

6 months for EP

Validity/Invalidity Search is useful to:

• Determine value of potential licensed patent by licensee

• Determine strength of patent for setting minimum royalty payments by licensor

• Invalidate patent in order to avoid infringement or legal challenge

Understanding the request

• Review patent(s) and background

• Conference with the client

– Which date(s)

– Specific claims?

– Specific client suggestions/preferences

– Personal suggestions

– Check for prior opposition, searches

Structure – how specific or broad?

Search General Approach

• Review/learn search topic

• Understand exactly client’s request

• Create comprehensive strategy

• Search using available and appropriate files

• Analyze

• Prepare organized and understandable report

Search Specific Approach

Invalidity searches should focus on areas or sources of prior art which patent granting office(s) did not search in special case or usually is not used for searches:

– Searches focusing on literature (patent and non-patent) not covered by usual public patent data bases

– Searches using other IPC classes as used by the patent office(s) in individual case

– Searches conducted by patent offices not involved in prosecution of the special patent family

Hand searches in libraries as well as searches on public use and other “non-written” prior art

Comments

Popular posts from this blog

Databases on the FDA Website

IPEXL - New Patent Search Tool

Employee Retention – A critical issue, why..and How to solve?