G01N 21/55
Specular reflectivity
G01N21/55 (Specular reflectivity) appears on 4,321 US grants and 4,971 published applications in this corpus.
Search patents in G01N- Granted patents
- 4,321
- Published applications
- 4,971
- Assignees
- 2,271
- Inventors
- 9,963
- Latest grant
- 6 Oct 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 3 | 0 |
| 1977 | 5 | 0 |
| 1978 | 5 | 0 |
| 1979 | 5 | 0 |
| 1980 | 6 | 0 |
| 1981 | 7 | 0 |
| 1982 | 4 | 0 |
| 1983 | 7 | 0 |
| 1984 | 10 | 0 |
| 1985 | 11 | 0 |
| 1986 | 14 | 0 |
| 1987 | 12 | 0 |
| 1988 | 24 | 0 |
| 1989 | 22 | 0 |
| 1990 | 22 | 0 |
| 1991 | 38 | 0 |
| 1992 | 29 | 0 |
| 1993 | 30 | 0 |
| 1994 | 31 | 0 |
| 1995 | 34 | 0 |
| 1996 | 32 | 0 |
| 1997 | 29 | 0 |
| 1998 | 40 | 0 |
| 1999 | 59 | 0 |
| 2000 | 31 | 0 |
| 2001 | 46 | 24 |
| 2002 | 60 | 101 |
| 2003 | 61 | 115 |
| 2004 | 75 | 142 |
| 2005 | 81 | 164 |
| 2006 | 126 | 226 |
| 2007 | 147 | 195 |
| 2008 | 150 | 169 |
| 2009 | 137 | 191 |
| 2010 | 138 | 228 |
| 2011 | 152 | 218 |
| 2012 | 158 | 209 |
| 2013 | 184 | 238 |
| 2014 | 194 | 267 |
| 2015 | 200 | 264 |
| 2016 | 208 | 232 |
| 2017 | 189 | 223 |
| 2018 | 200 | 237 |
| 2019 | 213 | 249 |
| 2020 | 210 | 225 |
| 2021 | 171 | 233 |
| 2022 | 171 | 218 |
| 2023 | 154 | 162 |
| 2024 | 158 | 185 |
| 2025 | 143 | 145 |
| 2026 | 85 | 111 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
- G01N 21/552Attenuated total reflection2,294
- G01N 21/57Measuring gloss382
- G01N 2021/556Measuring separately scattering and specularIndexing code124
- G01N 2021/558Measuring reflectivity and transmissionIndexing code75
- G01N 2021/555Measuring total reflection power, i.e. scattering and specularIndexing code45
- G01N 2021/551RetroreflectanceIndexing code44
- G01N 2021/557Detecting specular reflective parts on sampleIndexing code21
- G01N 2021/559Determining variation of specular reflection within diffusively reflecting sampleIndexing code20
Recent patents
- Detection device and measurement apparatus6 Oct 2026US 12,754,134 B2FUJIFILM Corporation
- Plasmonic hydrogen detection29 Sep 2026US 12,748,048 B2King's College London
- Plasmonic device29 Sep 2026US 12,748,049 B2Ostia Technologies Limited
- Fiber optic sensing apparatus and system29 Sep 2026US 12,748,257 B2Jinan University
- Method and system for evaluation of an interaction between an analyte and a ligand using a biosensor22 Sep 2026US 12,742,776 B2Cytiva Sweden AB
- Waste tape recovery device8 Oct 2026US 2026/0305894 A1Fuji Corporation
- Hyperspectral Image-Guided Ocular Imager for Alzheimer's Disease Pathologies1 Oct 2026US 2026/0294329 A1Retispec Inc.
- Multiple Azimuth, Multiple Pass Optical Measurements Of Semiconductor Structures1 Oct 2026US 2026/0298807 A1
- Sensor apparatus and image forming apparatus1 Oct 2026US 2026/0299480 A1KYOCERA Document Solutions Inc.
- Waveguide with Controlled Mode Confinement for Analyte Interaction and Optical Power Delivery17 Sep 2026US 2026/0276533 A1ORCA Computing Limited
Most cited
By later US patents
- Terminal and electronic water-resistance method919US 9,590,433 B2Zte Corporation · 2017
- Optical-based sensing devices745US 6,330,464 B1Sensors for Medicine and Science, Inc. · 2001
- Method of and apparatus for determining the similarity of a biological analyte from a model constructed from known biological fluids581US 4,975,581 AUniversity of New Mexico · 1990
- Optical-based sensing devices, especially for in-situ sensing in humans390US 6,304,766 B1Sensors for Medicine and Science, Inc. · 2001
- Moisture sensor for detecting moisture on a windshield385US 5,414,257 AIntrolab Pty Limited · 1995