G01N 13/02
Investigating surface tension of liquids
G01N13/02 (Investigating surface tension of liquids) appears on 395 US grants and 347 published applications in this corpus.
Search patents in G01N- Granted patents
- 395
- Published applications
- 347
- Assignees
- 317
- Inventors
- 1,103
- Latest grant
- 18 Aug 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 1 | 0 |
| 1977 | 1 | 0 |
| 1978 | 1 | 0 |
| 1979 | 0 | 0 |
| 1980 | 5 | 0 |
| 1981 | 3 | 0 |
| 1982 | 3 | 0 |
| 1983 | 5 | 0 |
| 1984 | 4 | 0 |
| 1985 | 6 | 0 |
| 1986 | 6 | 0 |
| 1987 | 8 | 0 |
| 1988 | 0 | 0 |
| 1989 | 3 | 0 |
| 1990 | 7 | 0 |
| 1991 | 2 | 0 |
| 1992 | 6 | 0 |
| 1993 | 4 | 0 |
| 1994 | 11 | 0 |
| 1995 | 6 | 0 |
| 1996 | 7 | 0 |
| 1997 | 5 | 0 |
| 1998 | 6 | 0 |
| 1999 | 6 | 0 |
| 2000 | 4 | 0 |
| 2001 | 5 | 4 |
| 2002 | 5 | 4 |
| 2003 | 6 | 8 |
| 2004 | 8 | 22 |
| 2005 | 11 | 15 |
| 2006 | 10 | 11 |
| 2007 | 12 | 12 |
| 2008 | 10 | 4 |
| 2009 | 8 | 11 |
| 2010 | 8 | 7 |
| 2011 | 9 | 7 |
| 2012 | 7 | 7 |
| 2013 | 7 | 9 |
| 2014 | 9 | 15 |
| 2015 | 6 | 19 |
| 2016 | 14 | 11 |
| 2017 | 9 | 16 |
| 2018 | 13 | 21 |
| 2019 | 16 | 19 |
| 2020 | 23 | 18 |
| 2021 | 12 | 19 |
| 2022 | 15 | 25 |
| 2023 | 26 | 21 |
| 2024 | 16 | 12 |
| 2025 | 13 | 16 |
| 2026 | 7 | 14 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
- G01N 2013/0241Bubble, pendant drop, sessile drop methodsIndexing code129
- G01N 2013/0208By measuring contact angleIndexing code88
- G01N 2013/0275Involving surface-active agentsIndexing code41
- G01N 2013/0283Methods of calculating surface tensionIndexing code28
- G01N 2013/0225Of liquid metals or solderIndexing code19
- G01N 2013/0216By measuring skin friction or shear forceIndexing code14
- G01N 2013/0233Langmuir troughsIndexing code9
- G01N 2013/0291Wilhelmy plateIndexing code3
Recent patents
- Method of measuring contact angle of silicon wafer and method of evaluating surface condition of silicon wafer18 Aug 2026US 12,710,347 B2Sumco Corporation
- Wettability evaluation device and method28 Jul 2026US 12,693,200 B2Hitachi High-Tech Corporation
- Method of robust surfactant screening for foam applications21 Jul 2026US 12,687,477 B2Saudi Arabian Oil Company
- Surface energy measurement instrument for metal foil and measurement method using the same26 May 2026US 12,638,371 B2LG Energy Solution, Ltd.
- Method for measuring liquid flow property and apparatus for observing droplet14 Apr 2026US 12,601,669 B2Ccteg Coal Mining Research Institute
- Antifogging agent1 Oct 2026US 2026/0298803 A1Resonac Corporation
- Viscosity and surface tension measurement using resonance of levitated droplets17 Sep 2026US 2026/0276508 A1
- Neutron reflectivity-rheology sample environment for investigating materials at air-liquid and liquid-liquid interfaces and methods of use thereof27 Aug 2026US 2026/0251545 A1
- Apparatus and methods for foam generation and foam evaluation4 Jun 2026US 2026/0153421 A1University of Wyoming
- Method for predicting surface tension of (h2+n2)/h2o system based on linear gradient theory (lgt) and perkins-rammler (pr) state equation4 Jun 2026US 2026/0153423 A1Jiangsu University
Most cited
By later US patents
- System for manipulating drops and bubbles using acoustic radiation pressure131US 6,003,388 AThe United States of America as represented by the Administrator of the National Aeronautics and Space Administration · 1999
- Surface mount technology evaluation board having varied board pad characteristics100US 6,888,360 B1Research In Motion Limited · 2005
- Solid body surface evaluation method, magnetic disk evaluation method, magnetic disk, and manufacturing method thereof71US 7,174,775 B2Hoya Corporation · 2007
- Solid body surface evaluation method, magnetic disk evaluation method, magnetic disk, and manufacturing method thereof69US 7,695,833 B2Hoya Corporation · 2010
- Method and apparatus for evaporating multi-component liquids56US 7,070,121 B2S. C. Johnson & Son, Inc. · 2006