Method for the phosgenation of compounds comprising hydroxyl, thiol, amino and/or formamide groups
US-10118145-B2 · Nov 6, 2018 · US
Chemistry & Metallurgy
Chemistry & Metallurgy · 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 | C01B31/28 |
| Official title | — |
| Display label | Chemistry & Metallurgy (mapped technology topic) |
| Total patents | 28 |
Filing trend
Year-over-year patent counts classified under this CPC code.
Filing activity appears to be declining based on the most recent years.
| Year | Patents |
|---|---|
| 2015 | 4 |
| 2016 | 9 |
| 2017 | 13 |
| 2018 | 2 |
Representative patents
Representative publications under this CPC code from precomputed stats, or recent filings when stats are unavailable.
Method and apparatus for producing high purity phosgene
US-10059594-B2 · Aug 28, 2018 · US
Method for operating a gas-phase phosgenation plant
US-9840461-B2 · Dec 12, 2017 · US
Method for starting up and shutting down a phosgene generator
US-9815703-B2 · Nov 14, 2017 · US
Method for the phosgenation of compounds comprising hydroxyl, thiol, amino and/or formamide groups
US-2017274341-A1 · Sep 28, 2017 · US
Method for phosgenating compounds containing hydroxyl, thiol, amino and/or formamide groups
US-2017274346-A1 · Sep 28, 2017 · US
Process for extracting phosgene
US-9751768-B2 · Sep 5, 2017 · US
Method for producing carbonates
US-9695106-B2 · Jul 4, 2017 · US
Method for producing carbonates
US-9670131-B2 · Jun 6, 2017 · US
Method and apparatus for producing high purity phosgene
US-9663373-B2 · May 30, 2017 · US
Method for operating a gas-phase phosgenation plant
US-2017101367-A1 · Apr 13, 2017 · US
Methods and compositions for making an amino acid triisocyanate
US-9573889-B2 · Feb 21, 2017 · US
Process for Extracting Phosgene
US-2017008771-A1 · Jan 12, 2017 · US
Method for producing carbonates
US-2017001943-A1 · Jan 5, 2017 · US
Process to separate phosgene and hydrogen chloride from a fluid stream comprising phosgene and hydrogen chloride
US-9533885-B2 · Jan 3, 2017 · US
Method for producing carbonates
US-2016347701-A1 · Dec 1, 2016 · US
Method for starting up and shutting down a phosgene generator
US-2016340196-A1 · Nov 24, 2016 · US
Device and method for producing phosgene
US-9480958-B2 · Nov 1, 2016 · US
Catalyst for preparing phosgene and method for preparing phosgene using the same
US-9399582-B2 · Jul 26, 2016 · US
Method and apparatus for producing high purity phosgene
US-2016207779-A1 · Jul 21, 2016 · US
Frequently asked questions
Answers are generated from the same data shown on this page.
- What is CPC C01B31/28?
- CPC C01B31/28 is the Cooperative Patent Classification code for “Chemistry & Metallurgy.”
- How many patents are filed under CPC C01B31/28 (Chemistry & Metallurgy)?
- Our database includes 28 publications tagged with this CPC code.
- Is patent activity under CPC C01B31/28 growing?
- Publication counts under this code: 13 in 2017 vs 2 in 2018 (latest complete years).