MicrobeHunter.com Microscopy Forum

A couple of patents related to the early years of the development of phase microscopy.

1942 application /1947 grant
https://patents.google.com/patent/US2427689A/en


1948 application/1951 grant
https://patents.google.com/patent/US2565419A/en

Hi Phil,
in the first American Optical patent names several patents from 1907 onwards. It would be interesting to research how much invention Zernike actually did.

Bob

Zernike patents on espacenet:

https://worldwide.espacenet.com/publica ... cale=en_EP

Which cites

https://worldwide.espacenet.com/publica ... cale=en_EP

MichaelG.

May I respectfully request a distillation of this thread in plain English for us Earth People? Thank you.

KurtM wrote: ↑

Sat Oct 12, 2019 2:46 am

May I respectfully request a distillation of this thread in plain English for us Earth People? Thank you.

Sorry, Kurt ... I don’t see the problem
I would be happy to comply with your request if I knew what was wrong.

Zernike was a man
Patents are a claim of novelty of invention
Phase Contrast is a technique

We are building a list.

MichaelG.

KurtM wrote: ↑

Sat Oct 12, 2019 2:46 am

May I respectfully request a distillation of this thread in plain English for us Earth People? Thank you. 8-)

It all started with this thread: viewtopic.php?f=6&t=8158 in which a consensus was reached that DIC did not make Phase obsolete.

then another thread based on a link to an illumination technique called Relief Phase posted in the first thread was started: viewtopic.php?f=28&p=71653#p71596

This thread was a little ragged, with members speculating on whether Zernike dressed to the left or the right and in what year Phase was commercially available; turns out it was 1941.

lastly this thread with links to Phase patents was subsequently posted.

Thanks, 75 - that's perfect.

MichaelG., sorry I was less than clear, but 75RR got us covered so all is well. Thanks again, amigo.

As some bloke from Stratford-upon-Avon wrote:

All’s well that ends well

MichaelG.