F25B 2700/21172
At the inlet
Official title: at the inlet
F25B2700/21172 (At the inlet) appears on 218 US grants and 243 published applications in this corpus.
Search patents in F25B- Granted patents
- 218
- Published applications
- 243
- Assignees
- 107
- Inventors
- 513
- Latest grant
- 11 Aug 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1977 | 1 | 0 |
| 1978 | 0 | 0 |
| 1979 | 1 | 0 |
| 1980 | 1 | 0 |
| 1981 | 1 | 0 |
| 1982 | 0 | 0 |
| 1983 | 0 | 0 |
| 1984 | 1 | 0 |
| 1985 | 1 | 0 |
| 1986 | 1 | 0 |
| 1987 | 0 | 0 |
| 1988 | 0 | 0 |
| 1989 | 1 | 0 |
| 1990 | 2 | 0 |
| 1991 | 4 | 0 |
| 1992 | 0 | 0 |
| 1993 | 4 | 0 |
| 1994 | 1 | 0 |
| 1995 | 2 | 0 |
| 1996 | 2 | 0 |
| 1997 | 2 | 0 |
| 1998 | 2 | 0 |
| 1999 | 3 | 0 |
| 2000 | 2 | 0 |
| 2001 | 1 | 2 |
| 2002 | 1 | 1 |
| 2003 | 3 | 4 |
| 2004 | 8 | 11 |
| 2005 | 10 | 8 |
| 2006 | 8 | 22 |
| 2007 | 10 | 7 |
| 2008 | 7 | 12 |
| 2009 | 1 | 1 |
| 2010 | 3 | 12 |
| 2011 | 4 | 5 |
| 2012 | 4 | 10 |
| 2013 | 3 | 8 |
| 2014 | 5 | 12 |
| 2015 | 11 | 16 |
| 2016 | 7 | 10 |
| 2017 | 18 | 11 |
| 2018 | 13 | 16 |
| 2019 | 15 | 7 |
| 2020 | 10 | 6 |
| 2021 | 4 | 9 |
| 2022 | 10 | 10 |
| 2023 | 4 | 10 |
| 2024 | 14 | 14 |
| 2025 | 5 | 11 |
| 2026 | 7 | 8 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
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- Compressor staging control architecture for hot gas reheat systems23 Jul 2026US 2026/0210575 A1Trane International Inc.
- Heat pump systems with pressure exchangers9 Jul 2026US 2026/0194265 A1Energy Recovery, Inc.
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Most cited
By later US patents
- Air filter monitoring system159US 7,244,294 B22007
- Apparatus and method for detecting faults and providing diagnostics in vapor compression cycle equipment156US 6,658,373 B2Field Diagnostic Services, Inc. · 2003
- Intelligent thermostat system for monitoring a refrigerant-cycle apparatus134US 7,331,187 B22008
- Cooling control system and expansion valve therefor118US 4,506,518 APacific Industrial Co., Ltd. · 1985
- Temperature control apparatus and method of determining malfunction106US 6,708,507 B1Thermo King Corporation · 2004