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Welcome

Welcome to latepatents.net! Established in June of 2006, this site is intended as an entertainment and educational resource to inventors facing "writers block." The latepatents.net database of patents is based on the listings of patents expired due to pay maintenance fees as published in the weekly United States Patent Official Gazette.

There are many patent searching web sites available, but we are the first one to list only the patents that expired early due to failure to pay maintenance fees. While this site does not offer legal advice, it is generally understood that expired patents are public domain. Consequently, the ideas formerly protected under the patents listed on this site are free of the usual encumbrances that patents carry. Please read our disclaimer, and then enjoy. I hope you will find this site to be very entertaining and useful!

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Top Companies

This is the "who's who" in the patent neglect world! It is really interesting who the top companies are that let their patents slide. More...

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Classes by alpha

Want to browse through the patents by their classification? Here's the directory of current U.S. classifications, in alphabetical order. More...

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Search

Type in a keyword, pick the field and search by a variety of criteria including title, abstract, assignee (fun!) and More...

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Under Construction

Pardon our dust, but we are developing the site live rather than on a development server, so you may at times see erratic behaviors as you browse. Check this link for more information if you are experiencing difficulties. More...

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Disclaimer

This web site is an entertainment and educational resource only. The content here is not endorsed by the U.S. Patent and Trademark Office. While every effort is made to ensure the accuracy of the information presented, your use of this site is at your own risk. It is intended only as a supplement, not a substitute, to professional patent research. More...

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