I believe that the battle over crystalline polypropylene as a composition of
matter lasted 35 years and came down to a single dated line in a notebook to
establish inventorship.
Howard Efner
73 de KF5RGU
On Feb 9, 2019, at 14:21, `Richard Knoppow <dickburk@xxxxxxxxxxxxx> wrote:
The history of patent litigation over nitrocellulose film base is described
at:
https://www.wired.com/2011/05/0502celuloid-photographic-film/
This is, I believe, one of the longest litigations in patent history.
On 2/9/2019 1:08 PM, Howard Efner wrote:
Richard, you are right. The changes were made to harmonize US patent law
with European and world patent regulations. The other big change was going
from “first to invent” to “first to file” for setting precedent.
Howard Efner
73 de KF5RGU
On Feb 9, 2019, at 14:00, `Richard Knoppow <dickburk@xxxxxxxxxxxxx> wrote:==========================================================================================================To
I think this was to make US law consistent with European patent law.
Trade secrets have a fair amount of protection in law but transgressions
are harder to prove.
On 2/9/2019 12:51 PM, Howard Efner wrote:
All, with the change in US patent law (about 2000) patent terms changed
from 17 years from date of issue to 20 years from date of filing.
Howard Efner
73 de KF5RGU
On Feb 9, 2019, at 13:35, `Richard Knoppow <dickburk@xxxxxxxxxxxxx> wrote:==========================================================================================================To
Patents had a lifetime of seventeen years (now twenty I think) while one
could protect a trade secret forever,
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Richard Knoppow
dickburk@xxxxxxxxxxxxx
WB6KBL
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