C21D 1/763
Using a catalyst
Official title: {using a catalyst}
C21D1/763 (Using a catalyst) appears on 39 US grants and 4 published applications in this corpus.
Search patents in C21D- Granted patents
- 39
- Published applications
- 4
- Assignees
- 21
- Inventors
- 55
- Latest grant
- 14 Nov 2017
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1978 | 1 | 0 |
| 1979 | 0 | 0 |
| 1980 | 2 | 0 |
| 1981 | 2 | 0 |
| 1982 | 0 | 0 |
| 1983 | 1 | 0 |
| 1984 | 0 | 0 |
| 1985 | 0 | 0 |
| 1986 | 0 | 0 |
| 1987 | 0 | 0 |
| 1988 | 0 | 0 |
| 1989 | 1 | 0 |
| 1990 | 0 | 0 |
| 1991 | 2 | 0 |
| 1992 | 3 | 0 |
| 1993 | 2 | 0 |
| 1994 | 7 | 0 |
| 1995 | 3 | 0 |
| 1996 | 0 | 0 |
| 1997 | 1 | 0 |
| 1998 | 5 | 0 |
| 1999 | 2 | 0 |
| 2000 | 2 | 0 |
| 2001 | 2 | 0 |
| 2002 | 0 | 0 |
| 2003 | 0 | 0 |
| 2004 | 0 | 1 |
| 2005 | 0 | 0 |
| 2006 | 0 | 0 |
| 2007 | 0 | 0 |
| 2008 | 0 | 0 |
| 2009 | 0 | 1 |
| 2010 | 0 | 0 |
| 2011 | 0 | 0 |
| 2012 | 1 | 0 |
| 2013 | 0 | 1 |
| 2014 | 0 | 0 |
| 2015 | 1 | 0 |
| 2016 | 0 | 1 |
| 2017 | 1 | 0 |
By publication year. Applications have been published since 2001.
Recent patents
- Process gas preparation apparatus for an industrial furnace system and an industrial furnace system for gas carburizing and hardening of metal workpieces utilizing same14 Nov 2017US 9,816,154 B2Ipsen, Inc.
- Furnace atmosphere generator13 Oct 2015US 9,157,682 B2Linde Aktiengesellschaft
- Method and device for thermal treatment of metallic materials20 Nov 2012US 8,313,586 B2Ipsen International GmbH
- Compact deoxo system14 Aug 2001US 6,274,102 B1Praxair Technology, Inc.
- Compact deoxo system2 Jan 2001US 6,168,774 APraxair Technology, Inc.
- Process Gas Preparation Apparatus for an Industrial Furnace System and an Industrial Furnace System for Gas Carburizing and Hardening of Metal Workpieces Utilizing Same22 Sep 2016US 2016/0273065 A1Ipsen, Inc.
- Furnace atmosphere generator31 Jan 2013US 2013/0026685 A1Linde Aktiengesellschaft
- Method and Device for Thermal Treatment of Metallic Materials24 Dec 2009US 2009/0314388 A1Ipsen International GmbH
- Gas generator and method for generating a treatment gas, which contains co and h2 for heat treating metallic material13 May 2004US 2004/0088921 A1
Most cited
By later US patents
- Furnace with protective atmosphere for heating metals30US 4,294,436 AKanto Yakin Kogyo K.K. · 1981
- Method of producing nitrogen-hydrogen atmospheres for metals processing28US 5,348,592 AAir Products and Chemicals, Inc. · 1994
- Process for heat treating metals in a continuous oven under controlled atmosphere24US 5,069,728 AL Air Liquide, Societe Anonyme Pour L'Etude et L'Exploitation des Procedes Georges Claude · 1991
- Process and apparatus for producing heat treatment atmospheres19US 5,441,581 APraxair Technology, Inc. · 1995
- Atmospheres for heat treating non-ferrous metals and alloys15US 5,298,090 AAir Products and Chemicals, Inc. · 1994