Because I threw these techniques, using a cloud of dust to create an even layer and using silk screen printing technique to create 3d objects, today in theMessage 1 of 8 , Mar 26, 2010View SourceBecause I threw these techniques, using a cloud of dust to create an even layer and using silk screen printing technique to create 3d objects, today in the public domain and because these have not yet been patented (AFAIK) nobody has the right to patent them from now on.
quote wikipedia:Novelty is a patentability requirement. An invention is not patentable if the claimed subject matter was disclosed before the date of filing, or before the date of priority if a priority is claimed, of the patent application.
Hummm, I see no reference to dental plaster as build powder. should I fill a patent ? :-) I´ll take a better look at those patents for shure.Message 1 of 8 , Mar 26, 2010View SourceHummm, I see no reference to dental plaster as build powder. should I fill a patent ? :-)
I´ll take a better look at those patents for shure.
--- In firstname.lastname@example.org, Henry Liu <henryjliu@...> wrote:
> Looks like 3D printing is going to hit the public domain in about a month.
> The original MIT 3d printing patent 5204055 is set to expire on April 20,
> Issued 1993 (before 1995 is 17 years, 1993+17=2010). First application date
> was 1989 (20 years after is 2009). Longer of the two is April 20, 2010.
> In addition, all "child" continuation patents should be expiring at the same
> 5,807,437 THREE-DIMENSIONAL PRINTING TECHNIQUES
> 5,387,380 THREE-DIMENSIONAL PRINTING TECHNIQUES
> 6,036,777 POWDER DISPENSING APPARATUS USING VIBRATION
> Patent Expired Due to NonPayment of Maintenance Fees Under 37 CFR 1.362
> 5,340,656 THREE-DIMENSIONAL PRINTING TECHNIQUES
> 5,807,437 THREE DIMENSIONAL PRINTING SYSTEM
> The expiring claims cover:
> inkjet printing for 3d printing
> using powder for 3d printing
> using a liquid binder for 3d printing
> using a roller for spreading
> using pistons for the z axis
> Seems like everything important has expired and looks like free for all now.
> Things that might not be expired:
> specific compounds for powders/binders
> Any comments?