Patenting and the Public Domain

known and used for a long time?  Can someone who is newly commercializing it (or something with its properties) successfully patent it or write patent claims that include such a cultivar within the scope of the claims? We are well-aware that people are trying to do just that. Our visceral reaction tells us this is wrong; and it is also rejected by public policy everywhere that patents exist. It should never be possible for a new patent to take something out of the public domain and to restrict its accessibility.

Sometimes people ask what qualifies for a patent, a trademark, or a copyright. The answer is usually somewhat instinctive: it must be something they created; it can’t be something that has already been around for a long time without that person’s contribution. This kind of instinctual analysis inherently reflects a notion that whatever has recently been created and has value is not part of the public domain and could at least, theoretically, belong to one owner. It is a very important part of intellectual property theory that, once something is in the public domain, intellectual property rights should never be allowed to take it back out.

Protecting the Public Domain from Encroachment by Overbroad Patents

This is the reasoning behind banning trademarks on any generic term; it is also the reason for only permitting patents on things that are new. So when a patent examiner is given a new application to review and determine whether the things that are being claimed are really patentable, he or she looks at the “prior art” — which is really just published information about what is already in the public domain. Part of the process of patent examination is to identify whatever in the public domain is closest to what is being claimed as an invention and, if it is too close, the patent examiner rejects the claims. So, in this way of looking at things, the patent examiner is protecting the public domain from encroachment by a patent applicant.

If something has been known, done, sold, or discussed so long and/or so widely that no one can legitimately claim it is still their own unique secret, that’s public domain — even if that thing (whether public, cultural, academic, or commercial) was never published. Of course, in some industries, the actual public domain and that part of it which is published are not very much alike.

The Problem of Public Domain in the Absence of a Detailed Published History

A great example of this is the marijuana industry, in which the lack of publication was associated with the illegality of the activities. Now that the activities are no longer illegal in many jurisdictions and people are applying for patents, the industry is facing this unique challenge. Patent examiners performing their normal search of relevant publications in the prior art have almost nothing to work with. The lack of relevant prior art can result in examiners allowing patent claims that cover public-domain subject matter, because there’s no prior art basis for rejecting claims that are that broad.

On the other hand, people who have been working in the industry for a long time are very well aware of things that were openly known in the industry but that were never published. Therefore, particularly in the situation of marijuana patenting, there is a large disconnect between what is in the ‘real’ public domain and what is in the prior art.

Coming back to the more general concept, the message regarding the public domain is that people really can at least start by trusting their instincts about whether something should be protected by a trademark, a patent, or a copyright. Is it really new, or does it already belong to the public? That’s the question. The answer gives us a good starting point for discussing whether something should be protectable in an intellectual property system.

* For purposes of brevity, I am using the term ‘public domain’ very broadly; there are exceptions and nuances I won’t go into here, since this is a blog and not a treatise.