C21D 9/0093
Heat treatment: for screws
Official title: {for screws; for bolts}
C21D9/0093 (Heat treatment: for screws) appears on 105 US grants and 124 published applications in this corpus.
Search patents in C21D- Granted patents
- 105
- Published applications
- 124
- Assignees
- 87
- Inventors
- 295
- Latest grant
- 2 Jun 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1978 | 1 | 0 |
| 1979 | 0 | 0 |
| 1980 | 0 | 0 |
| 1981 | 0 | 0 |
| 1982 | 0 | 0 |
| 1983 | 0 | 0 |
| 1984 | 0 | 0 |
| 1985 | 1 | 0 |
| 1986 | 0 | 0 |
| 1987 | 0 | 0 |
| 1988 | 3 | 0 |
| 1989 | 0 | 0 |
| 1990 | 1 | 0 |
| 1991 | 0 | 0 |
| 1992 | 1 | 0 |
| 1993 | 5 | 0 |
| 1994 | 5 | 0 |
| 1995 | 7 | 0 |
| 1996 | 2 | 0 |
| 1997 | 1 | 0 |
| 1998 | 2 | 0 |
| 1999 | 4 | 0 |
| 2000 | 1 | 0 |
| 2001 | 3 | 1 |
| 2002 | 5 | 3 |
| 2003 | 5 | 5 |
| 2004 | 1 | 5 |
| 2005 | 2 | 3 |
| 2006 | 1 | 4 |
| 2007 | 1 | 6 |
| 2008 | 1 | 6 |
| 2009 | 1 | 6 |
| 2010 | 3 | 5 |
| 2011 | 1 | 3 |
| 2012 | 1 | 6 |
| 2013 | 2 | 5 |
| 2014 | 2 | 3 |
| 2015 | 3 | 7 |
| 2016 | 3 | 6 |
| 2017 | 5 | 5 |
| 2018 | 4 | 8 |
| 2019 | 4 | 6 |
| 2020 | 6 | 1 |
| 2021 | 3 | 8 |
| 2022 | 5 | 2 |
| 2023 | 2 | 6 |
| 2024 | 1 | 9 |
| 2025 | 2 | 3 |
| 2026 | 4 | 2 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Method for producing a screw, and screw2 Jun 2026US 12,644,162 B2EJOT GmbH & Co. KG
- Two-piece high-strength screw28 Apr 2026US 12,612,936 B2KAMAX Holding GmbH & Co. KG
- Screw element and method for additive manufacture20 Jan 2026US 12,527,608 B2MIMEO MEDICAL GmbH
- Wire rod and component, for cold forging, each having excellent delayed fracture resistance characteristics, and manufacturing methods therefor20 Jan 2026US 12,529,117 B2Posco
- Fastening structures with high coefficient of thermal expansion for reduction of thermally driven stresses in securing aluminum silicon alloys17 Jun 2025US 12,331,698 B1Brunswick Corporation
- Steel alloy, article of manufacture and method23 Jul 2026US 2026/0209916 A1Hilti Aktiengesellschaft
- Fastener, fastener system, and method of forming the fastener23 Jul 2026US 2026/0210396 A1GM Global Technology Operations LLC
- Component with integrated nickel diffusion layer6 Mar 2025US 2025/0075360 A1KAMAX Holding GmbH & Co. KG
- Methods for manufacturing wire rod for cold forging and screw part, having excellent drilling characteristics6 Feb 2025US 2025/0043376 A1Posco
- Component made of b-zr alloyed steel16 Jan 2025US 2025/0019811 A1KAMAX Holding GmbH & Co. KG
Most cited
By later US patents
- Self-drilling/self-tapping fastener66US 5,755,542 AElco Textron Inc. · 1998
- Screw45US 6,514,026 B1Toge-Dübel A. Gerhard KG · 2003
- Warm forming high strength steel parts42US 5,538,566 AConsolidated Metal Products, Inc. · 1996
- Method of baking treatment of steel product parts37US 6,855,217 B2Aoyama Seisakusho Co., Ltd. · 2005
- Screws having selected heat treatment and hardening35US 6,109,851 AIllinois Tool Works Inc. · 2000