C03B 37/02772
Shaping the preform lower end or bulb
Official title: {shaping the preform lower end or bulb, e.g. pre-gobbing, controlling draw bulb shape, or preform draw start-up procedures}
C03B37/02772 (Shaping the preform lower end or bulb) appears on 17 US grants and 21 published applications in this corpus.
Search patents in C03B- Granted patents
- 17
- Published applications
- 21
- Assignees
- 9
- Inventors
- 37
- Latest grant
- 10 Mar 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1989 | 1 | 0 |
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| 1992 | 0 | 0 |
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| 2002 | 0 | 1 |
| 2003 | 0 | 2 |
| 2004 | 1 | 0 |
| 2005 | 1 | 1 |
| 2006 | 0 | 1 |
| 2007 | 0 | 0 |
| 2008 | 0 | 0 |
| 2009 | 0 | 1 |
| 2010 | 0 | 0 |
| 2011 | 1 | 0 |
| 2012 | 0 | 2 |
| 2013 | 0 | 2 |
| 2014 | 1 | 1 |
| 2015 | 1 | 1 |
| 2016 | 2 | 1 |
| 2017 | 1 | 1 |
| 2018 | 2 | 3 |
| 2019 | 0 | 0 |
| 2020 | 2 | 0 |
| 2021 | 0 | 0 |
| 2022 | 1 | 2 |
| 2023 | 0 | 2 |
| 2024 | 1 | 0 |
| 2025 | 1 | 0 |
| 2026 | 1 | 0 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Optical fiber manufacturing method and apparatus10 Mar 2026US 12,570,566 B2Furukawa Electric Co., Ltd.
- Wire-drawing optical fiber base material manufacturing method and manufacturing apparatus10 Jun 2025US 12,325,657 B2Shin-Etsu Chemical Co., Ltd.
- Elongating method and elongating apparatus for glass base material20 Aug 2024US 12,065,373 B2Shin-Etsu Chemical Co., Ltd.
- Wire-drawing optical fiber base material manufacturing method and manufacturing apparatus12 Jul 2022US 11,384,006 B2Shin-Etsu Chemical Co., Ltd.
- Production method for multicore optical fiber26 May 2020US 10,662,106 B2Sumitomo Electric Industries, Ltd.
- Optical fiber manufacturing method and apparatus6 Jul 2023US 2023/0212057 A1Furukawa Electric Co., Ltd.
- Method for automatically processing conical tip of optical fiber preform8 Jun 2023US 2023/0174407 A1Jiangsu Etern Company Limited
- Wire-drawing optical fiber base material manufacturing method and manufacturing apparatus20 Oct 2022US 2022/0332627 A1Shin-Etsu Chemical Co., Ltd.
- Elongating method and elongating apparatus for glass base material4 Aug 2022US 2022/0242772 A1Shin-Etsu Chemical Co., Ltd.
- Wire-drawing optical fiber base material manufacturing method and manufacturing apparatus6 Sep 2018US 2018/0251393 A1Shin-Etsu Chemical Co., Ltd.
Most cited
By later US patents
- Single mode optical fiber, method of manufacturing the same, and apparatus for manufacturing the same10US 6,954,572 B2Furukawa Electric Co., Ltd. · 2005
- Method of manufacturing single mode optical fiber7US 8,020,411 B2Furukawa Electric Co., Ltd. · 2011
- Method for pregobbing an optical fiber preform and system producing optical fiber therefrom6US 6,779,363 B1Corning Incorporated · 2004
- Method for optical fibre manufacture4US 4,801,324 AStc PLC · 1989
- Optical fiber preform and method of manufacturing optical fiber using optical fiber preform2US 9,321,670 B2Fujikura Ltd. · 2016