C23C 8/26
Of ferrous surfaces
Official title: of ferrous surfaces
C23C8/26 (Of ferrous surfaces) appears on 428 US grants and 550 published applications in this corpus.
Search patents in C23C- Granted patents
- 428
- Published applications
- 550
- Assignees
- 282
- Inventors
- 1,293
- Latest grant
- 19 May 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 2 | 0 |
| 1977 | 1 | 0 |
| 1978 | 0 | 0 |
| 1979 | 1 | 0 |
| 1980 | 2 | 0 |
| 1981 | 2 | 0 |
| 1982 | 3 | 0 |
| 1983 | 1 | 0 |
| 1984 | 1 | 0 |
| 1985 | 2 | 0 |
| 1986 | 3 | 0 |
| 1987 | 3 | 0 |
| 1988 | 2 | 0 |
| 1989 | 3 | 0 |
| 1990 | 2 | 0 |
| 1991 | 2 | 0 |
| 1992 | 1 | 0 |
| 1993 | 4 | 0 |
| 1994 | 1 | 0 |
| 1995 | 4 | 0 |
| 1996 | 3 | 0 |
| 1997 | 2 | 0 |
| 1998 | 5 | 0 |
| 1999 | 2 | 0 |
| 2000 | 6 | 0 |
| 2001 | 6 | 1 |
| 2002 | 6 | 12 |
| 2003 | 8 | 8 |
| 2004 | 9 | 10 |
| 2005 | 3 | 9 |
| 2006 | 1 | 19 |
| 2007 | 3 | 11 |
| 2008 | 2 | 8 |
| 2009 | 4 | 12 |
| 2010 | 11 | 12 |
| 2011 | 3 | 9 |
| 2012 | 8 | 23 |
| 2013 | 11 | 17 |
| 2014 | 9 | 27 |
| 2015 | 8 | 35 |
| 2016 | 14 | 48 |
| 2017 | 23 | 45 |
| 2018 | 35 | 30 |
| 2019 | 39 | 25 |
| 2020 | 33 | 33 |
| 2021 | 29 | 35 |
| 2022 | 23 | 39 |
| 2023 | 26 | 22 |
| 2024 | 30 | 20 |
| 2025 | 23 | 20 |
| 2026 | 3 | 20 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Processing method and processing apparatus for metal component19 May 2026US 12,630,914 B2Parker Netsushori Kogyo K.K.
- Steel sheet and method of manufacturing a steel sheet for packaging10 Feb 2026US 12,545,973 B2thyssenkrupp Rasselstein GmbH
- Rolling member and rolling bearing13 Jan 2026US 12,523,255 B2Ntn Corporation
- Iron-based nanoparticles and grains30 Dec 2025US 12,512,238 B2Regents of the University of Minnesota
- Soft magnetic iron sheet, method for producing soft magnetic iron sheet, and, iron core and dynamo-electric machine, each using soft magnetic iron sheet30 Dec 2025US 12,512,239 B2Hitachi, Ltd.
- Steel product and method for modifying steel product17 Sep 2026US 2026/0275486 A1Sumitomo Heavy Industries, Ltd.
- Method for nitriding a steel3 Sep 2026US 2026/0258544 A1Safran Transmission Systems
- High-magnetic-induction grain-oriented silicon steel with excellent surface and preparation method therefor27 Aug 2026US 2026/0250810 A1Shougang Zhixin Electromagnetic Materials (Qian'an) Co., Ltd.
- High-magnetic-induction grain-oriented silicon steel and preparation method thereof20 Aug 2026US 2026/0242887 A1Shougang Zhixin Electromagnetic Materials (Qian'an) Co., Ltd.
- Ceramic coating13 Aug 2026US 2026/0234782 A1
Most cited
By later US patents
- Expandable locking thread joint100US 6,619,696 B2Baker Hughes Incorporated · 2003
- Method for treating at least one part of soft magnetic material to form a hard wear area39US 5,769,965 ARobert Bosch GmbH · 1998
- Inhibiting coke formation by heat treating in nitrogen atmosphere36US 5,298,091 AUnited Technologies Corporation · 1994
- Corrosion resistant steel components and method of manufacture thereof30US 4,496,401 ALucas Industries Limited · 1985
- Rolling bearing27US 6,290,398 B1Koyo Seiko Co., Ltd. · 2001