Preparation of metformin hydrochloride free from genotoxic impurity
US-2021380529-A1 · Dec 9, 2021 · US
X and Y being nitrogen atoms, i.e. biguanides · Cooperative Patent Classification (CPC)
Chemical and metallurgical processes, compounds, and materials.
Mapped technology topics for this CPC code.
| Metric | Value |
|---|---|
| CPC code | C07C279/26 |
| Official title | X and Y being nitrogen atoms, i.e. biguanides |
| Display label | X and Y being nitrogen atoms, i.e. biguanides |
| Total patents | 76 |
Year-over-year patent counts classified under this CPC code.
Filing activity over the last five years is rapidly declining.
| Year | Patents |
|---|---|
| 2015 | 8 |
| 2016 | 5 |
| 2017 | 6 |
| 2018 | 10 |
| 2019 | 19 |
| 2020 | 9 |
| 2021 | 6 |
| 2022 | 5 |
| 2023 | 3 |
| 2024 | 3 |
| 2025 | 2 |
Representative publications under this CPC code from precomputed stats, or recent filings when stats are unavailable.
US-2021380529-A1 · Dec 9, 2021 · US
US-2021355074-A1 · Nov 18, 2021 · US
US-11091426-B1 · Aug 17, 2021 · US
US-10874644-B2 · Dec 29, 2020 · US
US-10774062-B2 · Sep 15, 2020 · US
US-10716771-B2 · Jul 21, 2020 · US
US-2020199168-A1 · Jun 25, 2020 · US
US-2020171158-A1 · Jun 4, 2020 · US
US-2020147127-A1 · May 14, 2020 · US
US-2020093124-A1 · Mar 26, 2020 · US
US-10588977-B2 · Mar 17, 2020 · US
US-2020062782-A1 · Feb 27, 2020 · US
US-10494350-B2 · Dec 3, 2019 · US
US-2019359561-A1 · Nov 28, 2019 · US
US-2019328685-A1 · Oct 31, 2019 · US
US-10449215-B2 · Oct 22, 2019 · US
US-2019298698-A1 · Oct 3, 2019 · US
US-10428014-B2 · Oct 1, 2019 · US
US-10428015-B2 · Oct 1, 2019 · US
US-10426746-B2 · Oct 1, 2019 · US
Answers are generated from the same data shown on this page.