Authored by John F. Hornick
As I explain in my new book, 3D Printing Will Rock the World, 3D printing has been around for about 30 years, which means that some of the earliest patents in this space are fond memories. From 2002 to 2014, about 225 early 3D printing patents expired. About 16 key patents relating to 3D printing processes called Material Extrusion, Powder Bed Fusion, and Vat Photopolymerization expired in 2013-14. This means that 3D printing technology that is at least 20 years old is now available for anyone to use.
When a patent expires, the invention goes into the public domain. But figuring out when a patent has actually expired can be tricky. The current U.S. patent term is 20 years from the date the patent application was filed in the U.S. Patent and Trademark Office (USPTO). Don’t assume, though, that every patent necessarily expires 20 years after its filing date.
For applications filed on or after June 8, 1995, the patent term is 20 years from the filing date (or 20 years from the filing date of an earlier application if it claims the benefit of that application).
For patents that were in force on June 8, 1995, or that issued from an application filed before that date, the patent term is the longer of (a) 20 years from the application filing date (or 20 years from the filing date of an earlier application if it claims the benefit of that application), and (b) 17 years from the patent grant.
The technology covered by a patent is defined and limited by its claims. A patent is infringed by making, using, selling, offering to sell, or importing a machine, component, or process that falls within the scope of its claims. So for expired 3D printing patents, the only technology that can be used safely, without infringement, is the technology covered by the claims and nothing more, not even improvements on the technology.
In other words, an expired 3D printing patent gives only the right to use that specific 20-year-old technology. To illustrate, let’s assume you know that a particular patent covering a coffee mug has expired. You might think you can freely make coffee mugs after the patent has expired, but if your new mugs have an improvement, like a protective sleeve, they might infringe a different, non-expired patent that covers coffee mugs with sleeves.
For a real-world example, consider Alexander Graham Bell’s telephone patent. After it expired in the late 1800s, anyone was free to use the technology covered by its claims. But telephone technology has come a long way since then, generating thousands of patents that companies like Apple and Samsung are warring over today. The freedom to use Bell’s technology doesn’t amount to much when the technology has long been surpassed.
So are expiring patents for old 3D printing technology going to change either the industrial or consumer 3D printing industries? For the former, probably not much. For the latter, there certainly are a lot of startups making Material Extrusion machines.
But will they be able to compete with innovators who obtain patents for improvements or new ways of 3D printing on the consumer level? While only time will tell, it seems unlikely.
Even though a few old 3D printing patents have expired, there is no shortage of patents and published applications in the additive manufacturing space (about 12,000).
Approximately 8,000 utility and design patents have been issued that relate in some way to additive manufacturing or rapid prototyping. Since 2000, approximately 4,000 applications have published that relate in some way to 3D printing. New applications are being filed all the time.
Some of these 12,000+ patents and applications cover 3D printing machines and machine components, but many are method patents, which cover methods, processes, and systems (including software) for making products and materials.
Others cover designs and materials. Importantly, although many of these patents and applications cover incremental improvements to old technology, others cover basic advances and whole new ways of making things.
Again, today’s telephones are far different from Bell’s.
So making, using, selling, offering to sell, or importing a 3D printer that does anything beyond the scope of the claims of an expired patent may infringe some other patent. If the printer includes any features or functionality covered by an improvement patent, the owner of that patent may assert an infringement claim. The same is true of method patents.
There is no quick and easy way to know if an additive manufacturing machine or process infringes one of the 8,000 patents or could infringe one of the 4,000 published applications (there is no potential liability for practicing the claims of a pending application, unless and until it issues as a patent).
Before making, using, selling, offering for sale, or importing any machine or component, or using any additive manufacturing process, ask a patent attorney if you’re concerned about infringement. The attorney can perform a patent search, analyze the relevant patents in the space, and provide a "freedom to operate" opinion.
On the other hand, the attorney may tell you that building and selling your 3D printer will infringe someone’s patent. You might also ask the attorney to provide an opinion on whether such patents are likely to be declared invalid by a court or the USPTO. But be forewarned. Even with an opinion saying you don’t infringe or that the patent is probably invalid, or both, you could still be sued for patent infringement, and even lose an infringement lawsuit.
Having such opinions, however, provide some peace of mind and may protect you from a charge that you willfully infringed a patent.
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