Process for the preparation of hexamethylenediamine by hydrogenation of adiponitrile with reduced formation of diaminocyclohexane
US-12415775-B2 · Sep 16, 2025 · US
1,6-Diaminohexanes
1,6-Diaminohexanes · Cooperative Patent Classification (CPC)
Chemical and metallurgical processes, compounds, and materials.
Related technology areas
Mapped technology topics for this CPC code.
| Metric | Value |
|---|---|
| CPC code | C07C211/12 |
| Official title | 1,6-Diaminohexanes |
| Display label | 1,6-Diaminohexanes |
| Total patents | 43 |
Filing trend
Year-over-year patent counts classified under this CPC code.
Filing activity over the last five years is rapidly declining.
| Year | Patents |
|---|---|
| 2015 | 9 |
| 2016 | 3 |
| 2017 | 5 |
| 2018 | 4 |
| 2019 | 8 |
| 2020 | 7 |
| 2021 | 3 |
| 2023 | 2 |
| 2024 | 1 |
| 2025 | 1 |
Representative patents
Representative publications under this CPC code from precomputed stats, or recent filings when stats are unavailable.
Method for the Processing and Transport of Hexane-1,6-Diamine or Pentane-1,5-Diamine
US-2024336555-A1 · Oct 10, 2024 · US
Process for the preparation of hexamethylenediamine by hydrogenation of adiponitrile with reduced formation of diaminocyclohexane
US-2023150918-A1 · May 18, 2023 · US
Oxidation catalysts
US-11596927-B2 · Mar 7, 2023 · US
Method for preparing primary diamines by Kolbe electrolysis coupling reaction
US-11198669-B2 · Dec 14, 2021 · US
Process for recovering adiponitrile
US-2021198185-A1 · Jul 1, 2021 · US
Process for the separation of alkanolamine from a mixture comprising an aliphatic primary diamine
US-2021002205-A1 · Jan 7, 2021 · US
Process for purifying hexamethylenediamine
US-2020407310-A1 · Dec 31, 2020 · US
Method for preparing primary diamines by kolbe electrolysis coupling reaction
US-2020385333-A1 · Dec 10, 2020 · US
Oxidation catalysts
US-10807074-B2 · Oct 20, 2020 · US
Porous shaped carbon products
US-10722867-B2 · Jul 28, 2020 · US
Lysine and proline based flame retardants
US-10717930-B2 · Jul 21, 2020 · US
Hydroformylation process for producing 1,6-disubstituted hexane derivatives
US-10647651-B2 · May 12, 2020 · US
Method for synthesising partially N-hydroxyethylated tertiary 1,6-hexanediamines
US-10618866-B2 · Apr 14, 2020 · US
Shaped porous carbon products
US-10384192-B2 · Aug 20, 2019 · US
Lysine and proline based flame retardants
US-2019211267-A1 · Jul 11, 2019 · US
Process for separation of diamines and/or omega-aminoacids from a feed mixture
US-10343084-B2 · Jul 9, 2019 · US
Lysine and proline based flame retardants
US-10329488-B2 · Jun 25, 2019 · US
Process for separation of diamines and/or omega-aminoacids from a feed fixture
US-10265642-B2 · Apr 23, 2019 · US
Lysine and proline based flame retardants
US-2019106631-A1 · Apr 11, 2019 · US
Frequently asked questions
Answers are generated from the same data shown on this page.
- What is CPC C07C211/12?
- CPC C07C211/12 is the Cooperative Patent Classification code for “1,6-Diaminohexanes.”
- How many patents are filed under CPC C07C211/12 (1,6-Diaminohexanes)?
- Our database includes 43 publications tagged with this CPC code.
- Is patent activity under CPC C07C211/12 growing?
- Publication counts under this code: 1 in 2024 vs 1 in 2025 (latest complete years).