C03B 2203/22
Radial profile of refractive index, composition or softening point
C03B2203/22 (Radial profile of refractive index, composition or softening point) appears on 657 US grants and 490 published applications in this corpus.
Search patents in C03B- Granted patents
- 657
- Published applications
- 490
- Assignees
- 189
- Inventors
- 1,102
- Latest grant
- 11 Aug 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 8 | 0 |
| 1977 | 6 | 0 |
| 1978 | 5 | 0 |
| 1979 | 9 | 0 |
| 1980 | 19 | 0 |
| 1981 | 12 | 0 |
| 1982 | 8 | 0 |
| 1983 | 12 | 0 |
| 1984 | 6 | 0 |
| 1985 | 8 | 0 |
| 1986 | 9 | 0 |
| 1987 | 7 | 0 |
| 1988 | 5 | 0 |
| 1989 | 15 | 0 |
| 1990 | 7 | 0 |
| 1991 | 10 | 0 |
| 1992 | 5 | 0 |
| 1993 | 10 | 0 |
| 1994 | 5 | 0 |
| 1995 | 3 | 0 |
| 1996 | 10 | 0 |
| 1997 | 20 | 0 |
| 1998 | 18 | 0 |
| 1999 | 13 | 0 |
| 2000 | 13 | 0 |
| 2001 | 11 | 8 |
| 2002 | 21 | 33 |
| 2003 | 31 | 37 |
| 2004 | 27 | 31 |
| 2005 | 19 | 36 |
| 2006 | 17 | 16 |
| 2007 | 16 | 10 |
| 2008 | 15 | 17 |
| 2009 | 6 | 15 |
| 2010 | 14 | 12 |
| 2011 | 11 | 14 |
| 2012 | 14 | 28 |
| 2013 | 15 | 18 |
| 2014 | 18 | 22 |
| 2015 | 18 | 30 |
| 2016 | 27 | 25 |
| 2017 | 25 | 28 |
| 2018 | 25 | 15 |
| 2019 | 12 | 16 |
| 2020 | 13 | 22 |
| 2021 | 13 | 12 |
| 2022 | 13 | 9 |
| 2023 | 12 | 16 |
| 2024 | 8 | 8 |
| 2025 | 7 | 7 |
| 2026 | 6 | 5 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
- C03B 2203/23Double or multiple optical cladding profilesIndexing code171
- C03B 2203/26Parabolic or graded index [grin] core profileIndexing code135
- C03B 2203/24Single mode [sm or monomode]Indexing code126
- C03B 2203/29Segmented core fibresIndexing code31
- C03B 2203/223Matching viscosities or softening points of glass layersIndexing code18
- C03B 2203/222Mismatching viscosities or softening points of glass layersIndexing code17
- C03B 2203/225Matching coefficients of thermal expansion [cte] of glass layersIndexing code14
- C03B 2203/224Mismatching coefficients of thermal expansion [cte] of glass layersIndexing code11
All 9 subgroupsShow fewer
Recent patents
- Polarization maintaining optical fiber and polarization maintaining optical fiber manufacturing method11 Aug 2026US 12,704,672 B2Sumitomo Electric Industries, Ltd.
- Method for producing fluorine-containing silica glass2 Jun 2026US 12,643,812 B2Sumitomo Electric Industries, Ltd.
- Photonic lanterns comprising optical fibers having up-down doped claddings2 Jun 2026US 12,645,033 B2Corning Incorporated
- Infrared-transmitting, polarization-maintaining optical fiber and method for making12 May 2026US 12,623,947 B2The Government of the United States of America, as represented by the Secretary of the Navy
- Optical fiber preform24 Mar 2026US 12,583,782 B2Shin-Etsu Chemical Co., Ltd.
- Infrared-transmitting, polarization-maintaining optical fiber and method for making27 Aug 2026US 2026/0250178 A1The Government of the United States of America, as represented by the Secretary of the Navy
- Anti-resonant hollow core optical fiber with contacting cladding elements with multiply nested capillaries27 Aug 2026US 2026/0251841 A1Corning Incorporated
- Optical fiber with reduced attenuation due to reduced absorption contribution5 Mar 2026US 2026/0063835 A1Corning Incorporated
- Optical fiber preform, method for measuring refractive index profile of optical fiber preform, and method for producing optical fiber preform29 Jan 2026US 2026/0029342 A1Fujikura Ltd.
- Optical fiber, optical fiber preform, and method of manufacturing optical fiber22 Jan 2026US 2026/0023212 A1Lightera Japan Co., Ltd.
Most cited
By later US patents
- Method of producing elliptic core type polarization-maintaining optical fiber241US 5,482,525 AHitachi Cable, Ltd. · 1996
- Nonlinear optical fibre method of its production and use thereof234US 7,266,275 B2Crystal Fibre A/S · 2007
- Optical fiber and method for making such fiber230US 7,313,312 B2Corning Incorporated · 2007
- Multi-core optical fiber and optical communication systems227US 8,503,845 B2Alcatel Lucent · 2013
- Large core area single mode optical fiber226US 8,903,214 B2Nkt Photonics A/S · 2014