Heat treatment system and atmosphere substitution structure of heat treatment furnace
US-2024426554-A1 · Dec 26, 2024 · US
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Door frames; Doors, lids or removable covers
Door frames; Doors, lids or removable covers · Cooperative Patent Classification (CPC)
Engines, pumps, lighting, heating, and mechanical systems.
Related technology areas
Mapped technology topics for this CPC code.
| Metric | Value |
|---|---|
| CPC code | F27D1/18 |
| Official title | Door frames; Doors, lids or removable covers |
| Display label | Door frames; Doors, lids or removable covers |
| Total patents | 22 |
Filing trend
Year-over-year patent counts classified under this CPC code.
Filing activity over the last five years is stable.
| Year | Patents |
|---|---|
| 2015 | 2 |
| 2016 | 3 |
| 2017 | 4 |
| 2018 | 4 |
| 2019 | 2 |
| 2020 | 3 |
| 2022 | 1 |
| 2023 | 1 |
| 2024 | 2 |
Representative patents
Representative publications under this CPC code from precomputed stats, or recent filings when stats are unavailable.
Oven
US-2024318824-A1 · Sep 26, 2024 · US
Slag door for a melting furnace
US-11614283-B2 · Mar 28, 2023 · US
Field installed perforated flame holder and method of assembly and installation
US-11221137-B2 · Jan 11, 2022 · US
Slag door for a melting furnace
US-2020309456-A1 · Oct 1, 2020 · US
Hybrid metal melting furnace
US-10598437-B2 · Mar 24, 2020 · US
Field installed perforated flame holder and method of assembly and installation
US-2020056782-A1 · Feb 20, 2020 · US
Melting material supply apparatus
US-10393437-B2 · Aug 27, 2019 · US
Refractory delta cooling system
US-10337797-B2 · Jul 2, 2019 · US
Melting material supply apparatus
US-2018320971-A1 · Nov 8, 2018 · US
Hybrid metal melting furnace
US-2018292134-A1 · Oct 11, 2018 · US
Pivot mechanism for furnace head
US-9982944-B2 · May 29, 2018 · US
Method of manufacturing a slag discharge door
US-9964360-B2 · May 8, 2018 · US
Abnormality detection method and blast furnace operation method
US-9799110-B2 · Oct 24, 2017 · US
Arc furnace
US-9657994-B2 · May 23, 2017 · US
Heat treatment apparatus
US-2017073786-A1 · Mar 16, 2017 · US
Refractory delta cooling system
US-2017003075-A1 · Jan 5, 2017 · US
Method and device for introducing fine particle-shaped material into the fluidised bed of a fluidised bed reduction unit
US-9512496-B2 · Dec 6, 2016 · US
Refractory delta cooling system
US-9464846-B2 · Oct 11, 2016 · US
Abnormality detection method and blast furnace operation method
US-2016148365-A1 · May 26, 2016 · US