C03C 25/66
Chemical treatment
Official title: Chemical treatment, e.g. leaching, acid or alkali treatment (dehydroxylation C03C25/64)
C03C25/66 (Chemical treatment) appears on 152 US grants and 139 published applications in this corpus.
Search patents in C03C- Granted patents
- 152
- Published applications
- 139
- Assignees
- 115
- Inventors
- 424
- Latest grant
- 21 Apr 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1977 | 5 | 0 |
| 1978 | 3 | 0 |
| 1979 | 1 | 0 |
| 1980 | 0 | 0 |
| 1981 | 3 | 0 |
| 1982 | 2 | 0 |
| 1983 | 1 | 0 |
| 1984 | 1 | 0 |
| 1985 | 1 | 0 |
| 1986 | 2 | 0 |
| 1987 | 0 | 0 |
| 1988 | 2 | 0 |
| 1989 | 0 | 0 |
| 1990 | 2 | 0 |
| 1991 | 3 | 0 |
| 1992 | 4 | 0 |
| 1993 | 1 | 0 |
| 1994 | 4 | 0 |
| 1995 | 2 | 0 |
| 1996 | 2 | 0 |
| 1997 | 3 | 0 |
| 1998 | 3 | 0 |
| 1999 | 3 | 0 |
| 2000 | 2 | 0 |
| 2001 | 1 | 1 |
| 2002 | 3 | 6 |
| 2003 | 1 | 3 |
| 2004 | 2 | 6 |
| 2005 | 3 | 7 |
| 2006 | 3 | 5 |
| 2007 | 5 | 2 |
| 2008 | 2 | 4 |
| 2009 | 3 | 5 |
| 2010 | 3 | 4 |
| 2011 | 4 | 3 |
| 2012 | 2 | 3 |
| 2013 | 2 | 4 |
| 2014 | 4 | 3 |
| 2015 | 5 | 5 |
| 2016 | 4 | 9 |
| 2017 | 9 | 8 |
| 2018 | 7 | 11 |
| 2019 | 4 | 8 |
| 2020 | 4 | 7 |
| 2021 | 7 | 8 |
| 2022 | 8 | 9 |
| 2023 | 7 | 8 |
| 2024 | 4 | 5 |
| 2025 | 4 | 3 |
| 2026 | 1 | 2 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- Method of fabricating an optical fibre preform21 Apr 2026US 12,606,482 B2Heriot-Watt University
- Method for producing optical fiber base material, and optical fiber base material26 Aug 2025US 12,398,062 B2Sumitomo Electric Industries, Ltd.
- Method for processing glass by alkaline etching12 Aug 2025US 12,384,714 B2Schott AG
- Cane-based multicore optical fiber and methods of forming22 Jul 2025US 12,365,622 B2Corning Incorporated
- Preform for optical fiber with low chlorine concentration improvements relating to loss and its use, method of its production and use thereof15 Apr 2025US 12,276,829 B2Nkt Photonics A/S
- Glass fiber,glass fiber woven fabric, and glass fiber-reinforced resin composition23 Jul 2026US 2026/0209111 A1Nitto Boseki Co., Ltd.
- Optical fiber with reduced attenuation due to reduced absorption contribution5 Mar 2026US 2026/0063835 A1Corning Incorporated
- Fibrous Core-Shell Silicon-Carbon Structures11 Dec 2025US 2025/0376415 A1The Regents of the University of California
- Glass cloth and method of manufacture20 Nov 2025US 2025/0353781 A1Shin-Etsu Chemical Co., Ltd.
- Optical fiber with low chlorine concentration improvements relating to loss and its use, method of its production and use thereof26 Jun 2025US 2025/0208338 A1Nkt Photonics A/S
Most cited
By later US patents
- Conformal oxide dry etch186US 9,093,390 B2APPLIED Materials.Inc. · 2015
- Conformal oxide dry etch183US 8,801,952 B1APPLIED Materials.Inc. · 2014
- Inorganic fiber composition133US 5,332,699 A1994
- Microscopic tube material and its method of manufacture118US 5,352,512 AThe United States of America as represented by the Secretary of the Air Force · 1994
- Method of manufacturing microscopic tube material113US 5,011,566 AThe United States of America as represented by the Secretary of the Air Force · 1991