Systems and methods for recovering ammonia from a subsurface formation
US-2025376911-A1 · Dec 11, 2025 · US
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Ammonium chloride
Ammonium chloride · 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 | C01C1/164 |
| Official title | {Ammonium chloride} |
| Display label | Ammonium chloride |
| Total patents | 19 |
Filing trend
Year-over-year patent counts classified under this CPC code.
Filing activity over the last five years is growing.
| Year | Patents |
|---|---|
| 2015 | 4 |
| 2016 | 3 |
| 2017 | 2 |
| 2018 | 2 |
| 2019 | 3 |
| 2022 | 1 |
| 2025 | 4 |
Representative patents
Representative publications under this CPC code from precomputed stats, or recent filings when stats are unavailable.
Process for preparing ammonium chloride
US-2025304459-A1 · Oct 2, 2025 · US
Rare earth and group 4 catalysts for ambient conversion of dinitrogen to secondary silylamines
US-2025262613-A1 · Aug 21, 2025 · US
Methods of reducing dinitrogen
US-12371334-B2 · Jul 29, 2025 · US
Methods of reducing dinitrogen
US-2022396491-A1 · Dec 15, 2022 · US
Lignocellulosic conversion process comprising sulfur dioxide and/or sulfurous acid pretreatment
US-10513714-B2 · Dec 24, 2019 · US
Process for treating lignocellulosic feedstock comprising wet oxidation
US-10421667-B2 · Sep 24, 2019 · US
Lignocellulosic conversion process comprising sulfur dioxide and/or sulfurous acid pretreatment
US-2019106718-A1 · Apr 11, 2019 · US
Methods and systems for utilizing carbide lime or slag
US-9902652-B2 · Feb 27, 2018 · US
Process for treating lignocellulosic feedstock comprising wet oxidation
US-2018029896-A1 · Feb 1, 2018 · US
Process for the preparation of trisilylamine from monochlorosilane and ammonia
US-9656869-B2 · May 23, 2017 · US
Production of trisilylamine from monochlorosilane and ammonia by use of inert solvent
US-9617155-B2 · Apr 11, 2017 · US
Process for making trisilylamine
US-9463978-B2 · Oct 11, 2016 · US
Process for making trisilylamine
US-2016145102-A1 · May 26, 2016 · US
Process for making trisilylamine
US-9284198-B2 · Mar 15, 2016 · US
Gaseous ammonia removal method
US-9174850-B2 · Nov 3, 2015 · US
Methods and systems for utilizing carbide lime or slag
US-2015307400-A1 · Oct 29, 2015 · US
Gaseous ammonia removal system
US-2015132210-A1 · May 14, 2015 · US
Process for making trisilylamine
US-2015004089-A1 · Jan 1, 2015 · US