Heat treat production fixture
US-10155999-B2 · Dec 18, 2018 · US
Stress-relieving
Stress-relieving · 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 | C21D1/30 |
| Official title | Stress-relieving |
| Display label | Stress-relieving |
| Total patents | 233 |
Filing trend
Year-over-year patent counts classified under this CPC code.
Filing activity over the last five years is growing.
| Year | Patents |
|---|---|
| 2015 | 16 |
| 2016 | 19 |
| 2017 | 13 |
| 2018 | 20 |
| 2019 | 18 |
| 2020 | 15 |
| 2021 | 14 |
| 2022 | 24 |
| 2023 | 28 |
| 2024 | 35 |
| 2025 | 27 |
| 2026 | 4 |
Representative patents
Representative publications under this CPC code from precomputed stats, or recent filings when stats are unavailable.
Method of reheating rail weld zone
US-10144983-B2 · Dec 4, 2018 · US
Method of relieving mechanical stress in additive manufacturing
US-2018333803-A1 · Nov 22, 2018 · US
Nano-pearlite rail and process for manufacturing same
US-10113219-B2 · Oct 30, 2018 · US
Method and fixture for counteracting tensile stress
US-2018282829-A1 · Oct 4, 2018 · US
Method for manufacturing endless metal belt, endless metal belt, and belt-type continuously variable transmission
US-2018231102-A1 · Aug 16, 2018 · US
Ultrahigh temperature elastic metal composites
US-9999920-B2 · Jun 19, 2018 · US
Methods, apparatus, computer programs and non-transitory computer readable storage mediums for manufacturing an article
US-2018161934-A1 · Jun 14, 2018 · US
Method for manufacturing superior 13Cr friction-welded drillrod
US-9988857-B2 · Jun 5, 2018 · US
Method for manufacturing endless metal belt, endless metal belt, and belt-type continuously variable transmission
US-9982749-B2 · May 29, 2018 · US
Manufacturing method of precision machine tool bearing with high precision stability
US-2018051751-A1 · Feb 22, 2018 · US
Pin-diverging device for releasing stresses and capacitor detection system
US-2018027663-A1 · Jan 25, 2018 · US
High strength and high toughness cast steel material and method for producing the same
US-9797034-B2 · Oct 24, 2017 · US
Turbine rotor
US-9797256-B2 · Oct 24, 2017 · US
High-strength and high-toughness steel plate with yield strength of 700 MPa and method of manufacturing the same
US-9771639-B2 · Sep 26, 2017 · US
Non-oriented electrical steel sheet and method for producing the same, and motor core and method of producing the same
US-2017260600-A1 · Sep 14, 2017 · US
Metal plate for laser processing and method for producing stainless steel plate for laser processing
US-2017239755-A1 · Aug 24, 2017 · US
Site conditions thick-wall P92 pipe local heat treatment method
US-9663841-B2 · May 30, 2017 · US
Method for manufacturing machine component, and rotary machine equipped with impeller manufactured by means of this method
US-9644482-B2 · May 9, 2017 · US
Adaptive additive manufacturing process using in-situ laser ultrasonic testing
US-2017059529-A1 · Mar 2, 2017 · US
Frequently asked questions
Answers are generated from the same data shown on this page.
- What is CPC C21D1/30?
- CPC C21D1/30 is the Cooperative Patent Classification code for “Stress-relieving.”
- How many patents are filed under CPC C21D1/30 (Stress-relieving)?
- Our database includes 233 publications tagged with this CPC code.
- Is patent activity under CPC C21D1/30 growing?
- Publication counts under this code: 35 in 2024 vs 27 in 2025 (latest complete years).