Update January 30, 2024:
Search PZP at the patent website:
https://brevets-patents.ic.gc.ca/opic-cipo/cpd/eng/search/results.html?query=PZP&start=1&num=10&type=basic_search&newSearch=0

#5 in the results is:
“5. 2378478 FERTILITY IMPAIRING VACCINE CONTAINING AVIAN ZONA PELLUCIDA PROTEIN AND METHOD OF USE”

But the link to the description for that item now fails to work.

Image of search results January 30, 2024:

Related to the last post, I tried different search terms with the Canadian Patents Database (http://brevets-patents.ic.gc.ca/opic-cipo/cpd/eng/introduction.html).

One of the results for the search term “PZP” was:

http://brevets-patents.ic.gc.ca/opic-cipo/cpd/eng/patent/2378478/summary.html (for that specific item 2378478, as of january 30, 2024, error “We’re having a problem with that page (Error 500)”)

(12) Patent Application: (11) CA 2378478
(54) English Title: FERTILITY IMPAIRING VACCINE CONTAINING AVIAN ZONA PELLUCIDA PROTEIN AND METHOD OF USE
. . .

English Abstract

A vaccine comprising an immunogen derived from an avian zona pellucida protein is useful for immunocontraception and immunosterilization of animals.
. . .

HT

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