Polyoxazoline based thermal latent curing agents for thermoset resins
US-2024270940-A1 · Aug 15, 2024 · US
Five-membered rings
Five-membered rings · 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 | C08K5/3445 |
| Official title | Five-membered rings |
| Display label | Five-membered rings |
| Total patents | 676 |
Filing trend
Year-over-year patent counts classified under this CPC code.
Filing activity over the last five years is declining.
| Year | Patents |
|---|---|
| 2015 | 39 |
| 2016 | 50 |
| 2017 | 58 |
| 2018 | 60 |
| 2019 | 71 |
| 2020 | 84 |
| 2021 | 68 |
| 2022 | 54 |
| 2023 | 52 |
| 2024 | 69 |
| 2025 | 55 |
| 2026 | 16 |
Representative patents
Representative publications under this CPC code from precomputed stats, or recent filings when stats are unavailable.
Polyamide 12 composition containing carbon nanotubes
US-9524807-B2 · Dec 20, 2016 · US
Resin composition, prepreg, and laminate
US-9512329-B2 · Dec 6, 2016 · US
Resin composition, prepreg, and laminate
US-9480164-B2 · Oct 25, 2016 · US
Reinforcing fiber fabric substrate, preform, and fiber-reinforced composite material
US-2016289406-A1 · Oct 6, 2016 · US
Imidazolium-based room-temperature ionic liquids, polymers, monomers and membranes incorporating same
US-9446348-B2 · Sep 20, 2016 · US
Rubber composition comprising a 1,3-dipolar compound additive bearing an imidazole functional group
US-2016263943-A1 · Sep 15, 2016 · US
Graphene compositions
US-9434834-B1 · Sep 6, 2016 · US
Halogen-free resin composition, and a prepreg and a laminate used for printed circuit using the same
US-2016244602-A1 · Aug 25, 2016 · US
Aqueous blocked polyurethane-urea dispersion
US-9404020-B2 · Aug 2, 2016 · US
Curable resin composition
US-2016208051-A1 · Jul 21, 2016 · US
Rubber composition containing a modified elastomer, method for preparing same, and tire containing same
US-9394434-B2 · Jul 19, 2016 · US
Reduction of Aldehydes in Amine Catalysts
US-2016200854-A1 · Jul 14, 2016 · US
Polymer compositions, polymer films, polymer gels, polymer foams, and electronic devices containing such films, gels and foams
US-9378859-B2 · Jun 28, 2016 · US
Resin composition and gate insulating film
US-2016160012-A1 · Jun 9, 2016 · US
Tire comprising a rubber composition comprising an olefinic epoxide elastomer cross-linked by a polycarboxylic acid
US-2016130418-A1 · May 12, 2016 · US
Tire comprising a rubber composition comprising an olefinic epoxide elastomer cross-linked by a polycarboxylic acid
US-2016122504-A1 · May 5, 2016 · US
Composition for wire protective member, wire protective member, and wiring harness
US-9287019-B2 · Mar 15, 2016 · US
Optical film, circularly polarizing plate and organic electroluminescent display device
US-2016070030-A1 · Mar 10, 2016 · US
Process for Producing Flexible Polyurethane Foam Using Natural Oil Polyols
US-2016032042-A1 · Feb 4, 2016 · US
Frequently asked questions
Answers are generated from the same data shown on this page.
- What is CPC C08K5/3445?
- CPC C08K5/3445 is the Cooperative Patent Classification code for “Five-membered rings.”
- How many patents are filed under CPC C08K5/3445 (Five-membered rings)?
- Our database includes 676 publications tagged with this CPC code.
- Is patent activity under CPC C08K5/3445 growing?
- Publication counts under this code: 69 in 2024 vs 55 in 2025 (latest complete years).