C03B 2201/30
Doped with metals
Official title: doped with metals, e.g. Ga, Sn, Sb, Pb or Bi
C03B2201/30 (Doped with metals) appears on 890 US grants and 814 published applications in this corpus.
Search patents in C03B- Granted patents
- 890
- Published applications
- 814
- Assignees
- 292
- Inventors
- 1,651
- Latest grant
- 11 Aug 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 8 | 0 |
| 1977 | 6 | 0 |
| 1978 | 5 | 0 |
| 1979 | 8 | 0 |
| 1980 | 15 | 0 |
| 1981 | 9 | 0 |
| 1982 | 11 | 0 |
| 1983 | 9 | 0 |
| 1984 | 6 | 0 |
| 1985 | 6 | 0 |
| 1986 | 9 | 0 |
| 1987 | 10 | 0 |
| 1988 | 4 | 0 |
| 1989 | 15 | 0 |
| 1990 | 12 | 0 |
| 1991 | 7 | 0 |
| 1992 | 13 | 0 |
| 1993 | 18 | 0 |
| 1994 | 13 | 0 |
| 1995 | 5 | 0 |
| 1996 | 5 | 0 |
| 1997 | 10 | 0 |
| 1998 | 25 | 0 |
| 1999 | 13 | 0 |
| 2000 | 20 | 0 |
| 2001 | 20 | 6 |
| 2002 | 33 | 53 |
| 2003 | 40 | 65 |
| 2004 | 40 | 43 |
| 2005 | 30 | 54 |
| 2006 | 29 | 30 |
| 2007 | 13 | 32 |
| 2008 | 26 | 32 |
| 2009 | 20 | 35 |
| 2010 | 20 | 34 |
| 2011 | 28 | 39 |
| 2012 | 26 | 40 |
| 2013 | 31 | 33 |
| 2014 | 32 | 24 |
| 2015 | 27 | 44 |
| 2016 | 38 | 31 |
| 2017 | 32 | 30 |
| 2018 | 20 | 22 |
| 2019 | 18 | 21 |
| 2020 | 17 | 24 |
| 2021 | 16 | 20 |
| 2022 | 12 | 19 |
| 2023 | 22 | 31 |
| 2024 | 12 | 19 |
| 2025 | 18 | 21 |
| 2026 | 8 | 12 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
- C03B 2201/31Doped with germaniumIndexing code453
- C03B 2201/34Doped with rare earth metals, i.e. with sc, y or lanthanidesIndexing code265
- C03B 2201/40Doped with transition metals other than rare earth metalsIndexing code258
- C03B 2201/32Doped with aluminiumIndexing code146
- C03B 2201/50Doped with alkali metalsIndexing code143
- C03B 2201/54Doped with beryllium, magnesium or alkaline earth metalsIndexing code79
- C03B 2201/58Doped with metals in non-oxide formIndexing code27
Recent patents
- Titania-silica glass with uniform hydroxyl concentration11 Aug 2026US 12,703,655 B2Corning Incorporated
- Polarization maintaining optical fiber and polarization maintaining optical fiber manufacturing method11 Aug 2026US 12,704,672 B2Sumitomo Electric Industries, Ltd.
- Method for making halogen doped optical element26 May 2026US 12,637,384 B2Corning Incorporated
- Cleaning step to remove metals or metal oxides from porous glass body19 May 2026US 12,630,459 B2Corning Incorporated
- Optical fiber glass preform and method for manufacturing optical fiber glass preform7 Apr 2026US 12,595,203 B2Shin-Etsu Chemical Co., Ltd.
- Titania-silica glass with uniform hydroxyl concentration8 Oct 2026US 2026/0308039 A1Corning Incorporated
- Methods of recycling cullet and fibreglass17 Sep 2026US 2026/0274733 A1Sibelco Nederland N.V.
- Reservoir, method for producing optical fiber, and device for producing optical fiber18 Jun 2026US 2026/0167553 A1Sumitomo Electric Industries, Ltd.
- Multicore optical fiber4 Jun 2026US 2026/0153668 A1Sumitomo Electric Industries, Ltd.
- Homogenous silica-titania glass21 May 2026US 2026/0140435 A1Corning Incorporated
Most cited
By later US patents
- Article comprising a micro-structured optical fiber, and method of making such fiber283US 5,802,236 ALucent Technologies Inc. · 1998
- Optical fiber and method for making such fiber230US 7,313,312 B2Corning Incorporated · 2007
- Large core area single mode optical fiber226US 8,903,214 B2Nkt Photonics A/S · 2014
- Rare earth doped and large effective area optical fibers for fiber lasers and amplifiers222US 8,213,758 B2Imra America, Inc. · 2012
- Rare earth doped and large effective area optical fibers for fiber lasers and amplifiers219US 8,542,968 B2Imra America, Inc. · 2013