C10N 2040/28
Rotary engines
Official title: Rotary {engines}
C10N2040/28 (Rotary engines) appears on 1,174 US grants and 72 published applications in this corpus.
Search patents in C10N- Granted patents
- 1,174
- Published applications
- 72
- Assignees
- 179
- Inventors
- 1,128
- Latest grant
- 4 Jan 2022
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 4 | 0 |
| 1977 | 2 | 0 |
| 1978 | 11 | 0 |
| 1979 | 21 | 0 |
| 1980 | 12 | 0 |
| 1981 | 15 | 0 |
| 1982 | 11 | 0 |
| 1983 | 13 | 0 |
| 1984 | 12 | 0 |
| 1985 | 28 | 0 |
| 1986 | 28 | 0 |
| 1987 | 45 | 0 |
| 1988 | 50 | 0 |
| 1989 | 67 | 0 |
| 1990 | 72 | 0 |
| 1991 | 65 | 0 |
| 1992 | 68 | 0 |
| 1993 | 74 | 0 |
| 1994 | 107 | 0 |
| 1995 | 55 | 0 |
| 1996 | 55 | 0 |
| 1997 | 71 | 0 |
| 1998 | 68 | 0 |
| 1999 | 59 | 0 |
| 2000 | 44 | 0 |
| 2001 | 35 | 8 |
| 2002 | 27 | 27 |
| 2003 | 26 | 13 |
| 2004 | 10 | 6 |
| 2005 | 3 | 2 |
| 2006 | 0 | 1 |
| 2007 | 2 | 1 |
| 2008 | 1 | 1 |
| 2009 | 0 | 2 |
| 2010 | 3 | 1 |
| 2011 | 1 | 1 |
| 2012 | 1 | 1 |
| 2013 | 0 | 0 |
| 2014 | 2 | 5 |
| 2015 | 0 | 2 |
| 2016 | 3 | 0 |
| 2017 | 1 | 0 |
| 2018 | 0 | 1 |
| 2019 | 1 | 0 |
| 2020 | 0 | 0 |
| 2021 | 0 | 0 |
| 2022 | 1 | 0 |
By publication year. Applications have been published since 2001.
Recent patents
- Combinations of phosphorous-containing compounds for use as anti-wear additives in lubricant compositions4 Jan 2022US 11,214,750 B2Afton Chemical Corporation
- Lubricating oil compositions23 Jul 2019US 10,358,617 B2Infineon International Limited
- Friction modifiers for lubricating oils24 Jan 2017US 9,550,955 B2Afton Chemical Corporation
- Additive compositions with a friction modifier and a detergent22 Nov 2016US 9,499,762 B2Afton Chemical Corporation
- Antifoam additives for use in low viscosity applications14 Jun 2016US 9,365,795 B2Afton Chemical Corporation
- Combinations of Phosphorous-Containing Compounds for Use as Anti-Wear Additives in Lubricant Compositions4 Jan 2018US 2018/0002631 A1Afton Chemical Corporation
- Lubricating oil compositions3 Dec 2015US 2015/0344810 A1lnfineum International Limited
- Lubricating oil compositions3 Dec 2015US 2015/0344812 A1Infineum International Limited
- Friction modifiers for lubricating oils26 Jun 2014US 2014/0179571 A1Afton Chemical Corporation
- Additive compositions with a friction modifier and a detergent26 Jun 2014US 2014/0179577 A1Alton Chemical Corporation
Most cited
By later US patents
- Lubricating composition228US 4,956,122 AUniroyal Chemical Company, Inc. · 1990
- Video device synchronization system190US 4,532,547 AAmpex Corporation · 1985
- Modified succinimides173US 4,612,132 AChevron Research Company · 1986
- Novel VI improver, dispersant, and anti-oxidant additive and lubricating oil composition containing same122US 4,863,623 ATexaco Inc. · 1989
- Oil filter containing an oil soluble thermoplastic additive material therein116US 5,591,330 AT/F Purifiner, Inc. · 1997