C23C 8/70
Of ferrous surfaces
Official title: of ferrous surfaces
C23C8/70 (Of ferrous surfaces) appears on 41 US grants and 28 published applications in this corpus.
Search patents in C23C- Granted patents
- 41
- Published applications
- 28
- Assignees
- 38
- Inventors
- 89
- Latest grant
- 11 Nov 2025
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 4 | 0 |
| 1977 | 1 | 0 |
| 1978 | 1 | 0 |
| 1979 | 0 | 0 |
| 1980 | 0 | 0 |
| 1981 | 1 | 0 |
| 1982 | 1 | 0 |
| 1983 | 1 | 0 |
| 1984 | 0 | 0 |
| 1985 | 2 | 0 |
| 1986 | 0 | 0 |
| 1987 | 2 | 0 |
| 1988 | 0 | 0 |
| 1989 | 1 | 0 |
| 1990 | 0 | 0 |
| 1991 | 1 | 0 |
| 1992 | 1 | 0 |
| 1993 | 2 | 0 |
| 1994 | 0 | 0 |
| 1995 | 1 | 0 |
| 1996 | 0 | 0 |
| 1997 | 1 | 0 |
| 1998 | 0 | 0 |
| 1999 | 0 | 0 |
| 2000 | 0 | 0 |
| 2001 | 1 | 0 |
| 2002 | 0 | 1 |
| 2003 | 1 | 0 |
| 2004 | 0 | 0 |
| 2005 | 0 | 0 |
| 2006 | 0 | 0 |
| 2007 | 0 | 1 |
| 2008 | 0 | 0 |
| 2009 | 0 | 1 |
| 2010 | 1 | 0 |
| 2011 | 0 | 1 |
| 2012 | 2 | 4 |
| 2013 | 0 | 4 |
| 2014 | 4 | 1 |
| 2015 | 2 | 4 |
| 2016 | 0 | 0 |
| 2017 | 1 | 0 |
| 2018 | 1 | 3 |
| 2019 | 0 | 1 |
| 2020 | 2 | 2 |
| 2021 | 2 | 2 |
| 2022 | 1 | 1 |
| 2023 | 1 | 0 |
| 2024 | 1 | 0 |
| 2025 | 1 | 1 |
| 2026 | 0 | 1 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Boronized corrosion resistant alloy component for high pressure and high temperature oilfield applications11 Nov 2025US 12,467,123 B2Beijing Huamei, Inc.
- Guiding member, mechanical system comprising such a guiding member, and method for producing such a guiding member24 Sep 2024US 12,098,744 B2Hydromecanique Et Frottement
- Integrated surface treatments and coatings for artificial lift pump components30 May 2023US 11,661,647 B2Schlumberger Technology Corporation
- Hybrid process for enhanced surface hardening8 Nov 2022US 11,491,541 B2Apollo Machine & Welding Ltd.
- Boronizing powder compositions for improved boride layer quality in oil country tubular goods and other metal articles7 Dec 2021US 11,192,792 B2BWT Aktiengesellschaft
- Oxidized and boronized layers for corrosion resistance4 Jun 2026US 2026/0152838 A1GM Global Technology Operations LLC
- Boronized corrosion resistant alloy component for high pressure and high temperature oilfield applications10 Apr 2025US 2025/0115986 A1Beijing Huamei, Inc.
- Guiding Member, Mechanical System Comprising Such A Guiding Member, And Method For Producing Such A Guiding Member14 Jul 2022US 2022/0220999 A1Hydromecanique Et Frottement
- Cutting blade for an agricultural implement, and method of manufacturing the same29 Apr 2021US 2021/0123127 A1Deere & Company
- Integrated Surface Treatments and Coatings for Artificial Lift Pump Components11 Mar 2021US 2021/0071306 A1Schlumberger Technology Corporation
Most cited
By later US patents
- Methods and compositions for boronizing metallic surfaces31US 4,555,326 ABetz Laboratories, Inc. · 1985
- Boron diffusion coating process30US 3,935,034 AHowmet Corporation · 1976
- Process for boriding metals and metal alloys by means of solid boriding agents26US 4,637,837 AElektroschmelzwerk Kempten GmbH · 1987
- Method for treating continuous extended lengths of tubular member interiors18US 5,455,068 A1995
- Boriding agent for boriding mass produced parts of ferrous and non-ferrous metals13US 4,126,488 ADeutsche Gold- und Silber-Scheideanstalt vormals Roessler · 1978