Free Patent Tools

Claim Set Comparison Tool

Ever wondered how the claims changed between the published application and the issued patent? Frustrated with figuring out the difference between the U.S. claims and the foreign counterpart claims? This handy tool compares two sets of claims and highlights the difference between them. The comparison chart can be displayed in a new browser window or downloaded as a Word or Excel file.

USPTO Widget

Tired of searching multiple USPTO databases using strict formatting to get the information you need? This online tool searches various USPTO databases to display bibliographic details, publication full text, patent full text, assignment details, and maintenance fees in one easy to use interface.

Patent Term Estimator

The term of a patent is 20 years from the earliest claimed priority date (or longer of 17 years from the issue date or 20 years from the earliest claimed priority date if the patent application was filed on or before June 8, 1995). 35 USC § 154.

Claim Chart Generator

This online tool automatically creates a claim chart template for the requested patent number. The claim chart can be generated in different formats like Word, Excel or HTML. The tool can generate charts either for all claims or for independent claims only (check the box provided).

Patent Maintenance Fee

This online tool automatically calculates the USPTO patent maintenance fee due for a given patent.

Reference Picker

Reference Picker 1.0 is a downloadable software tool that enables you to easily extract the US references, foreign references and other references from any patent specification (.rtf, .doc). The extracted references are displayed in MS Excel Format with links to the respective pages and are also concurrently highlighted in the given patent document

IFW File Splitter

IFW File splitter 1.0 is a downloadable software tool that enables you to easily extract the bookmarks from the File History PDF file into individual PDF files. Bulk IFW File Splitter option helps to split more than one File History PDF file in one click. This tool also helps to merge more than one PDF files in a folder into a single file.