F04C 2230/90
Improving properties of machine parts
F04C2230/90 (Improving properties of machine parts) appears on 277 US grants and 329 published applications in this corpus.
Search patents in F04C- Granted patents
- 277
- Published applications
- 329
- Assignees
- 197
- Inventors
- 832
- Latest grant
- 18 Aug 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 1 | 0 |
| 1977 | 0 | 0 |
| 1978 | 0 | 0 |
| 1979 | 0 | 0 |
| 1980 | 1 | 0 |
| 1981 | 0 | 0 |
| 1982 | 0 | 0 |
| 1983 | 0 | 0 |
| 1984 | 2 | 0 |
| 1985 | 1 | 0 |
| 1986 | 2 | 0 |
| 1987 | 0 | 0 |
| 1988 | 1 | 0 |
| 1989 | 1 | 0 |
| 1990 | 1 | 0 |
| 1991 | 4 | 0 |
| 1992 | 1 | 0 |
| 1993 | 2 | 0 |
| 1994 | 3 | 0 |
| 1995 | 4 | 0 |
| 1996 | 5 | 0 |
| 1997 | 5 | 0 |
| 1998 | 6 | 0 |
| 1999 | 3 | 0 |
| 2000 | 5 | 0 |
| 2001 | 3 | 2 |
| 2002 | 7 | 2 |
| 2003 | 3 | 10 |
| 2004 | 4 | 3 |
| 2005 | 3 | 6 |
| 2006 | 6 | 8 |
| 2007 | 6 | 15 |
| 2008 | 2 | 13 |
| 2009 | 2 | 13 |
| 2010 | 8 | 16 |
| 2011 | 11 | 13 |
| 2012 | 8 | 15 |
| 2013 | 9 | 20 |
| 2014 | 6 | 25 |
| 2015 | 16 | 19 |
| 2016 | 18 | 15 |
| 2017 | 11 | 23 |
| 2018 | 13 | 13 |
| 2019 | 13 | 13 |
| 2020 | 17 | 19 |
| 2021 | 13 | 18 |
| 2022 | 11 | 10 |
| 2023 | 10 | 12 |
| 2024 | 13 | 6 |
| 2025 | 9 | 15 |
| 2026 | 7 | 5 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- Fretting resistant rotary engine housings18 Aug 2026US 12,709,983 B2Pratt & Whitney Canada Corp.
- Compressor4 Aug 2026US 12,698,771 B2Carrier Japan Corporation
- Pump and method of manufacturing a sealing30 Jun 2026US 12,669,124 B2Pfeiffer Vacuum Technology AG
- Coating layer having a conforming material for a compressor and method of using the same17 Mar 2026US 12,577,950 B2Trane International Inc.
- Device for painting a compressor or vacuum pump housing and method applied3 Mar 2026US 12,564,854 B2Atlas Copco Airpower, Naamloze Vennootschap
- Compressor, method for manufacturing compressor, and method for evaluating coating material for compressor17 Sep 2026US 2026/0275985 A1Carrier Japan Corporation
- Metal felt and brush structures as sealing elements in metal-metal mud motors10 Sep 2026US 2026/0266284 A1Baker Hughes Oilfield Operations LLC
- Pump and method of manufacturing a sealing23 Jul 2026US 2026/0210357 A1Pfeiffer Vacuum Technology AG
- Stator lining, stator and method for producing a stator lining30 Apr 2026US 2026/0121461 A1
- Housing assembly for rotary engine and method of manufacturing thereof19 Mar 2026US 2026/0078695 A1Pratt & Whitney Canada Corp.
Most cited
By later US patents
- Rotary compressor with reduced lubrication sensitivity147US 5,947,710 ACarrier Corporation · 1999
- Method of making an efficiency enhanced fluid pump or compressor47US 5,638,600 AFord Motor Company · 1997
- Solid lubricant coating for fluid pump or compressor45US 5,554,020 AFord Motor Company · 1996
- Anti-wear coatings for scroll compressor wear surfaces43US 9,605,677 B2Emerson Climate Technologies, Inc. · 2017
- Rotary compressor with reduced lubrication sensitivity40US 5,672,054 ACarrier Corporation · 1997