G01N 9/12
By observing the depth of immersion of the bodies
Official title: by observing the depth of immersion of the bodies, e.g. hydrometers
G01N9/12 (By observing the depth of immersion of the bodies) appears on 128 US grants and 75 published applications in this corpus.
Search patents in G01N- Granted patents
- 128
- Published applications
- 75
- Assignees
- 83
- Inventors
- 245
- Latest grant
- 23 Jun 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 4 | 0 |
| 1977 | 3 | 0 |
| 1978 | 2 | 0 |
| 1979 | 3 | 0 |
| 1980 | 5 | 0 |
| 1981 | 6 | 0 |
| 1982 | 5 | 0 |
| 1983 | 1 | 0 |
| 1984 | 1 | 0 |
| 1985 | 2 | 0 |
| 1986 | 2 | 0 |
| 1987 | 4 | 0 |
| 1988 | 2 | 0 |
| 1989 | 5 | 0 |
| 1990 | 2 | 0 |
| 1991 | 4 | 0 |
| 1992 | 1 | 0 |
| 1993 | 4 | 0 |
| 1994 | 2 | 0 |
| 1995 | 1 | 0 |
| 1996 | 1 | 0 |
| 1997 | 2 | 0 |
| 1998 | 1 | 0 |
| 1999 | 3 | 0 |
| 2000 | 0 | 0 |
| 2001 | 0 | 1 |
| 2002 | 5 | 3 |
| 2003 | 1 | 3 |
| 2004 | 4 | 4 |
| 2005 | 1 | 0 |
| 2006 | 0 | 3 |
| 2007 | 1 | 3 |
| 2008 | 4 | 2 |
| 2009 | 2 | 7 |
| 2010 | 2 | 2 |
| 2011 | 4 | 4 |
| 2012 | 2 | 0 |
| 2013 | 2 | 0 |
| 2014 | 1 | 3 |
| 2015 | 1 | 2 |
| 2016 | 3 | 1 |
| 2017 | 2 | 2 |
| 2018 | 0 | 4 |
| 2019 | 3 | 4 |
| 2020 | 3 | 2 |
| 2021 | 3 | 4 |
| 2022 | 1 | 8 |
| 2023 | 4 | 5 |
| 2024 | 8 | 3 |
| 2025 | 4 | 4 |
| 2026 | 1 | 1 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- Sensor for quantifying production fluid percentage content23 Jun 2026US 12,662,937 B2Halliburton Energy Services.Inc.
- Sample analysis with mirrors29 Apr 2025US 12,287,350 B2President and Fellows of Harvard College
- Fluid property sensors having superimposed vibrations1 Apr 2025US 12,265,006 B2Rheonics GmbH
- Float angle probes for monitoring wellbore fluid composition and methods of using the same25 Feb 2025US 12,235,258 B2Newpark Drilling Fluids LLC
- Sensor for quantifying production fluid percentage content14 Jan 2025US 12,196,077 B2Halliburton Energy Services.Inc.
- Density sensor for quantifying production fluid content24 Sep 2026US 2026/0286835 A1Halliburton Energy Services.Inc.
- Concentration measuring method, concentration measuring apparatus, and program13 Nov 2025US 2025/0347605 A1NEC Corporation
- Alcohol testing device9 Oct 2025US 2025/0314562 A1
- Sensor for quantifying production fluid percentage content17 Apr 2025US 2025/0122800 A1Halliburton Energy Services.Inc.
- Fluid property sensors having superimposed vibrations13 Feb 2025US 2025/0052657 A1Rheonics GmbH
Most cited
By later US patents
- Visual and electronic battery hydrometer36US 3,954,010 AIllinois Tool Works Inc. · 1976
- Method and device for a self orienting floating apparatus32US 6,422,746 B1G & W Instruments, Inc. · 2002
- Ink liquid viscosity control in an ink liquid supply system for an ink jet system printer31US 4,422,085 ASharp Kabushiki Kaisha · 1983
- Brewing apparatus29US 4,557,186 ABowmans Brewer, Ltd. · 1985
- Digital electronic liquid density/liquid level meter28US 6,418,788 B22002