C03B 2207/06
Concentric circular ports
C03B2207/06 (Concentric circular ports) appears on 160 US grants and 103 published applications in this corpus.
Search patents in C03B- Granted patents
- 160
- Published applications
- 103
- Assignees
- 45
- Inventors
- 299
- Latest grant
- 24 Mar 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1977 | 1 | 0 |
| 1978 | 2 | 0 |
| 1979 | 1 | 0 |
| 1980 | 1 | 0 |
| 1981 | 0 | 0 |
| 1982 | 4 | 0 |
| 1983 | 10 | 0 |
| 1984 | 3 | 0 |
| 1985 | 1 | 0 |
| 1986 | 5 | 0 |
| 1987 | 3 | 0 |
| 1988 | 2 | 0 |
| 1989 | 4 | 0 |
| 1990 | 2 | 0 |
| 1991 | 3 | 0 |
| 1992 | 5 | 0 |
| 1993 | 6 | 0 |
| 1994 | 5 | 0 |
| 1995 | 1 | 0 |
| 1996 | 1 | 0 |
| 1997 | 6 | 0 |
| 1998 | 2 | 0 |
| 1999 | 3 | 0 |
| 2000 | 2 | 0 |
| 2001 | 5 | 4 |
| 2002 | 10 | 10 |
| 2003 | 7 | 8 |
| 2004 | 12 | 9 |
| 2005 | 1 | 10 |
| 2006 | 3 | 6 |
| 2007 | 3 | 2 |
| 2008 | 1 | 0 |
| 2009 | 1 | 6 |
| 2010 | 1 | 6 |
| 2011 | 2 | 6 |
| 2012 | 2 | 2 |
| 2013 | 7 | 5 |
| 2014 | 4 | 5 |
| 2015 | 3 | 3 |
| 2016 | 4 | 1 |
| 2017 | 6 | 1 |
| 2018 | 0 | 2 |
| 2019 | 1 | 2 |
| 2020 | 2 | 1 |
| 2021 | 1 | 5 |
| 2022 | 3 | 4 |
| 2023 | 3 | 2 |
| 2024 | 1 | 1 |
| 2025 | 3 | 1 |
| 2026 | 1 | 1 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Optical fiber preform24 Mar 2026US 12,583,782 B2Shin-Etsu Chemical Co., Ltd.
- Methods of forming silica-titania glass articles with reduced striae dimensions11 Nov 2025US 12,466,755 B2Corning Incorporated
- Synthetic quartz glass manufacturing method through OVD process with improved deposition efficiency16 Sep 2025US 12,415,743 B2BCnC Co., Ltd.
- Manufacturing method for glass particulate deposit and burner1 Apr 2025US 12,264,097 B2Shin-Etsu Chemical Co., Ltd.
- Process for the preparation of synthetic quartz glass13 Aug 2024US 12,060,293 B2Heraeus Quarzglas GmbH & Co.KG
- Methods of forming silica-titania glass articles with reduced striae dimensions1 Jan 2026US 2026/0001801 A1Corning Incorporated
- Optical fiber preform and method for producing optical fiber preform27 Feb 2025US 2025/0066239 A1Shin-Etsu Chemical Co., Ltd.
- Manufacturing method for glass particulate deposit and burner25 Jan 2024US 2024/0025792 A1Shin-Etsu Chemical Co., Ltd.
- Methods of forming silica-titania glass articles with reduced striae dimensions5 Oct 2023US 2023/0312387 A1Corning Incorporated
- Synthetic quartz glass manufacturing method through ovd process with improved deposition efficiency25 May 2023US 2023/0159371 A1BCnC Co., Ltd.
Most cited
By later US patents
- Method of making fused silica by decomposing siloxanes106US 5,043,002 ACorning Incorporated · 1991
- Method of making fused silica70US 5,152,819 ACorning Incorporated · 1992
- Optical members and blanks or synthetic silica glass and method for their production62US 5,086,352 AHeraeus Quarzglas GmbH & Co.KG · 1992
- Process for preparing glass preform for optical fiber46US 4,402,720 ANippon Telegraph & Telephone Public Corporation · 1983
- Method of using precision burners for oxidizing halide-free, silicon-containing compounds45US 5,599,371 ACorning Incorporated · 1997