C21D 9/26
Heat treatment: for needles
Official title: for needles; for teeth for card-clothing
C21D9/26 (Heat treatment: for needles) appears on 31 US grants and 19 published applications in this corpus.
Search patents in C21D- Granted patents
- 31
- Published applications
- 19
- Assignees
- 19
- Inventors
- 64
- Latest grant
- 17 Mar 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1979 | 2 | 0 |
| 1980 | 0 | 0 |
| 1981 | 0 | 0 |
| 1982 | 0 | 0 |
| 1983 | 0 | 0 |
| 1984 | 0 | 0 |
| 1985 | 0 | 0 |
| 1986 | 0 | 0 |
| 1987 | 2 | 0 |
| 1988 | 0 | 0 |
| 1989 | 0 | 0 |
| 1990 | 1 | 0 |
| 1991 | 1 | 0 |
| 1992 | 0 | 0 |
| 1993 | 0 | 0 |
| 1994 | 0 | 0 |
| 1995 | 1 | 0 |
| 1996 | 1 | 0 |
| 1997 | 0 | 0 |
| 1998 | 2 | 0 |
| 1999 | 2 | 0 |
| 2000 | 2 | 0 |
| 2001 | 1 | 0 |
| 2002 | 0 | 0 |
| 2003 | 1 | 0 |
| 2004 | 0 | 1 |
| 2005 | 0 | 0 |
| 2006 | 1 | 0 |
| 2007 | 0 | 1 |
| 2008 | 0 | 3 |
| 2009 | 0 | 4 |
| 2010 | 3 | 0 |
| 2011 | 4 | 2 |
| 2012 | 1 | 0 |
| 2013 | 1 | 0 |
| 2014 | 0 | 0 |
| 2015 | 0 | 1 |
| 2016 | 0 | 1 |
| 2017 | 0 | 2 |
| 2018 | 0 | 0 |
| 2019 | 2 | 0 |
| 2020 | 0 | 1 |
| 2021 | 1 | 0 |
| 2022 | 1 | 0 |
| 2023 | 0 | 1 |
| 2024 | 0 | 1 |
| 2025 | 0 | 1 |
| 2026 | 1 | 0 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Root canal instrument17 Mar 2026US 12,575,909 B2Gebr. Brasseler GmbH & Co. KG
- All-steel fitting16 Aug 2022US 11,414,792 B2Groz-Beckert KG
- Method of improving ductility of needle for root canal treatment devices and method of manufacturing needle for root canal treatment devices including method of improving ductility of needle for root canal treatment devices21 Dec 2021US 11,202,688 B2B&L Biotech, Inc.
- Tool for textiles and production method for same26 Nov 2019US 10,487,429 B2Groz-Beckert KG
- Method of hardening a clothing wire for processing textile fibres, and apparatus system therefor9 Jul 2019US 10,344,347 B2Truetzschler GmbH & Co. KG
- Non-magnetic fine stainless steel processed product and method for manufacturing the same19 Jun 2025US 2025/0195270 A1Terakata Manufacturing Co., Ltd,
- Method for laser hardening of a card wire28 Mar 2024US 2024/0102120 A1Groz-Beckert KG
- Root canal instrument7 Dec 2023US 2023/0390024 A1Gebr. Brasseler GmbH & Co. KG
- Method of improving ductility of needle for root canal treatment devices and method of manufacturing needle for root canal treatment devices including method of improving ductility of needle for root canal treatment devices24 Sep 2020US 2020/0297456 A1B&L Biotech, Inc.
- All-Steel Fitting25 May 2017US 2017/0145600 A1Groz-Beckert KG
Most cited
By later US patents
- Systems for percutaneous bone and spinal stabilization, fixation and repair1,069US 6,127,597 ADiscoTech N.V. · 2000
- Heat treated stainless steel needles85US 5,533,982 AUnited States Surgical Corporation · 1996
- Method of and apparatus for manufacturing eyeless suture needle50US 5,012,066 AMatsutani Seisakusho Co., Ltd. · 1991
- Sterile surgical needles with a hard sharp cutting edge and method for producing the same44US 4,660,559 AEthicon, Inc. · 1987
- Method of making heat treated stainless steel needles29US 5,411,613 AUnited States Surgical Corporation · 1995