Reduction catalyst and chemical reactor
US-2017369405-A1 · Dec 28, 2017 · US
of titanium, zirconium or hafnium
of titanium, zirconium or hafnium · Cooperative Patent Classification (CPC)
Separating, mixing, shaping, printing, and transporting materials.
Related technology areas
Mapped technology topics for this CPC code.
| Metric | Value |
|---|---|
| CPC code | B01J31/38 |
| Official title | of titanium, zirconium or hafnium |
| Display label | of titanium, zirconium or hafnium |
| Total patents | 261 |
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 | 22 |
| 2016 | 27 |
| 2017 | 29 |
| 2018 | 31 |
| 2019 | 38 |
| 2020 | 32 |
| 2021 | 23 |
| 2022 | 19 |
| 2023 | 13 |
| 2024 | 17 |
| 2025 | 9 |
| 2026 | 1 |
Representative patents
Representative publications under this CPC code from precomputed stats, or recent filings when stats are unavailable.
Methods for the Production of Alpha,Beta-Unsaturated Carboxylic Acids and Salts Thereof
US-2017349523-A1 · Dec 7, 2017 · US
Process for the preparation of 2,2′-bis-indenyl biphenyl ligands and their metallocene complexes
US-9828447-B2 · Nov 28, 2017 · US
Methods of preparing a catalyst
US-9796798-B2 · Oct 24, 2017 · US
Methods for the production of α,β-unsaturated carboxylic acids and salts thereof
US-9725393-B2 · Aug 8, 2017 · US
Photocatalytic film for soil fumigation
US-9668475-B2 · Jun 6, 2017 · US
Epoxidation catalysts based on metal alkoxide pretreated supports
US-9617233-B2 · Apr 11, 2017 · US
Solid titanium catalyst component, olefin polymerization catalyst, and process for producing olefin polymer
US-9593176-B2 · Mar 14, 2017 · US
Methods of preparing a catalyst
US-9587048-B2 · Mar 7, 2017 · US
Film system and method of forming same
US-2017056871-A1 · Mar 2, 2017 · US
Metal oxide nanofibrous materials for photodegradation of environmental toxins
US-2017056873-A1 · Mar 2, 2017 · US
Photocatalyst complex
US-2016375432-A1 · Dec 29, 2016 · US
Methods for producing oxygen and hydrogen from water using an iridium organometallic catalyst deposited on a titanium dioxide catalyst
US-2016361713-A1 · Dec 15, 2016 · US
Photocatalytic coating film and method for producing same
US-9517459-B2 · Dec 13, 2016 · US
Copper-and-titanium-containing composition and production method therefor
US-9516881-B2 · Dec 13, 2016 · US
Composite Catalyst for the Photocatalytic Isomerisation of Norbornadiene to Prepare Quadricyclane and Process for Making the Catalyst
US-2016339415-A1 · Nov 24, 2016 · US
Continuous Preparation Method of High-Purity Quadricyclane
US-2016340273-A1 · Nov 24, 2016 · US
Hydroprocessing catalyst and method for preparing same
US-2016339416-A1 · Nov 24, 2016 · US
Methods of Preparing a Catalyst
US-2016319052-A1 · Nov 3, 2016 · US
Methods for the Production of Alpha,Beta-Unsaturated Carboxylic Acids and Salts Thereof
US-2016311745-A1 · Oct 27, 2016 · US
Frequently asked questions
Answers are generated from the same data shown on this page.
- What is CPC B01J31/38?
- CPC B01J31/38 is the Cooperative Patent Classification code for “of titanium, zirconium or hafnium.”
- How many patents are filed under CPC B01J31/38 (of titanium, zirconium or hafnium)?
- Our database includes 261 publications tagged with this CPC code.
- Is patent activity under CPC B01J31/38 growing?
- Publication counts under this code: 17 in 2024 vs 9 in 2025 (latest complete years).