Photochromic hydrazone switches
US-11279677-B2 · Mar 22, 2022 · US
having nitrogen atoms of hydrazine groups bound to carbon atoms of six-membered aromatic rings · Cooperative Patent Classification (CPC)
Chemical and metallurgical processes, compounds, and materials.
Mapped technology topics for this CPC code.
| Metric | Value |
|---|---|
| CPC code | C07C243/22 |
| Official title | having nitrogen atoms of hydrazine groups bound to carbon atoms of six-membered aromatic rings |
| Display label | having nitrogen atoms of hydrazine groups bound to carbon atoms of six-membered aromatic rings |
| Total patents | 30 |
Year-over-year patent counts classified under this CPC code.
Filing activity over the last five years is stable.
| Year | Patents |
|---|---|
| 2015 | 4 |
| 2016 | 7 |
| 2017 | 9 |
| 2018 | 1 |
| 2019 | 3 |
| 2020 | 4 |
| 2021 | 1 |
| 2022 | 1 |
Representative publications under this CPC code from precomputed stats, or recent filings when stats are unavailable.
US-11279677-B2 · Mar 22, 2022 · US
US-2021024464-A1 · Jan 28, 2021 · US
US-10730848-B2 · Aug 4, 2020 · US
US-10633338-B2 · Apr 28, 2020 · US
US-10633353-B2 · Apr 28, 2020 · US
US-10597371-B2 · Mar 24, 2020 · US
US-2019300480-A1 · Oct 3, 2019 · US
US-2019256472-A1 · Aug 22, 2019 · US
US-10351527-B2 · Jul 16, 2019 · US
US-2018022716-A1 · Jan 25, 2018 · US
US-2017280718-A1 · Oct 5, 2017 · US
US-2017267629-A1 · Sep 21, 2017 · US
US-2017260150-A1 · Sep 14, 2017 · US
US-9701620-B2 · Jul 11, 2017 · US
US-2017158597-A1 · Jun 8, 2017 · US
US-9630910-B2 · Apr 25, 2017 · US
US-9604942-B2 · Mar 28, 2017 · US
US-2017036969-A1 · Feb 9, 2017 · US
US-2017029372-A1 · Feb 2, 2017 · US
US-9498461-B2 · Nov 22, 2016 · US
Answers are generated from the same data shown on this page.