F01L 2301/00
Cyclically operating valves for machines or engines: using particular materials
Official title: Using particular materials
F01L2301/00 (Cyclically operating valves for machines or engines: using particular materials) appears on 1,035 US grants and 1,108 published applications in this corpus.
Search patents in F01L- Granted patents
- 1,035
- Published applications
- 1,108
- Assignees
- 353
- Inventors
- 2,137
- Latest grant
- 14 Apr 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1979 | 1 | 0 |
| 1980 | 2 | 0 |
| 1981 | 1 | 0 |
| 1982 | 0 | 0 |
| 1983 | 2 | 0 |
| 1984 | 2 | 0 |
| 1985 | 1 | 0 |
| 1986 | 4 | 0 |
| 1987 | 1 | 0 |
| 1988 | 3 | 0 |
| 1989 | 14 | 0 |
| 1990 | 8 | 0 |
| 1991 | 11 | 0 |
| 1992 | 6 | 0 |
| 1993 | 6 | 0 |
| 1994 | 12 | 0 |
| 1995 | 6 | 0 |
| 1996 | 5 | 0 |
| 1997 | 10 | 0 |
| 1998 | 3 | 0 |
| 1999 | 6 | 0 |
| 2000 | 4 | 0 |
| 2001 | 4 | 10 |
| 2002 | 21 | 19 |
| 2003 | 32 | 58 |
| 2004 | 60 | 93 |
| 2005 | 52 | 74 |
| 2006 | 70 | 70 |
| 2007 | 56 | 65 |
| 2008 | 37 | 47 |
| 2009 | 23 | 40 |
| 2010 | 33 | 37 |
| 2011 | 23 | 50 |
| 2012 | 25 | 36 |
| 2013 | 43 | 32 |
| 2014 | 38 | 27 |
| 2015 | 29 | 35 |
| 2016 | 27 | 54 |
| 2017 | 41 | 56 |
| 2018 | 45 | 60 |
| 2019 | 51 | 54 |
| 2020 | 48 | 51 |
| 2021 | 49 | 54 |
| 2022 | 43 | 49 |
| 2023 | 32 | 20 |
| 2024 | 29 | 7 |
| 2025 | 11 | 5 |
| 2026 | 5 | 5 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- Additive manufactured assembly-free tool for maintenance of vehicle engine14 Apr 2026US 12,601,580 B2Volvo Truck Corporation
- Sliding member and internal combustion engine7 Apr 2026US 12,595,754 B2Fukuda Metal Foil & Powder Co., Ltd.
- Articles with an adhesive layer24 Feb 2026US 12,559,653 B2Dow Global Technologies LLC
- Poppet valve24 Feb 2026US 12,560,110 B2Eaton Intelligent Power Limited
- Green compact of a stator-cover unit6 Jan 2026US 12,516,614 B2GKN Sinter Metals Engineering GmbH
- Vane seal spring8 Oct 2026US 2026/0309060 A1
- Valve guide for guiding a valve stem11 Jun 2026US 2026/0160190 A1
- Retention Assembly for Variable Valve Actuation30 Apr 2026US 2026/0117682 A1Eaton Intelligent Power Limited
- Method of manufacturing nitrided valve seat insert with supersaturated nitrogen surface layer and product thereof5 Mar 2026US 2026/0062786 A1L. E. Jones Company
- Multi-composition thermal management coating systems for combustion chamber components26 Feb 2026US 2026/0055714 A1Cummins Inc.
Most cited
By later US patents
- Rolled electroactive polymers307US 6,891,317 B2SRI International · 2005
- Electroactive polymer devices for moving fluid149US 7,064,472 B2SRI International · 2006
- Powertrain component with adherent film having a graded composition132US 5,249,554 AFord Motor Company · 1993
- Marine hulls and drives97US 7,984,684 B22011
- Powertrain component with adherent amorphous or nanocrystalline ceramic coating system88US 5,309,874 AFord Motor Company · 1994