D01F 2/04
From cuprammonium solutions
Official title: from cuprammonium solutions
D01F2/04 (From cuprammonium solutions) appears on 16 US grants and 13 published applications in this corpus.
Search patents in D01F- Granted patents
- 16
- Published applications
- 13
- Assignees
- 16
- Inventors
- 50
- Latest grant
- 5 May 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1984 | 1 | 0 |
| 1985 | 0 | 0 |
| 1986 | 1 | 0 |
| 1987 | 0 | 0 |
| 1988 | 0 | 0 |
| 1989 | 2 | 0 |
| 1990 | 0 | 0 |
| 1991 | 0 | 0 |
| 1992 | 0 | 0 |
| 1993 | 0 | 0 |
| 1994 | 0 | 0 |
| 1995 | 0 | 0 |
| 1996 | 2 | 0 |
| 1997 | 1 | 0 |
| 1998 | 0 | 0 |
| 1999 | 2 | 0 |
| 2000 | 0 | 0 |
| 2001 | 0 | 0 |
| 2002 | 0 | 0 |
| 2003 | 0 | 1 |
| 2004 | 0 | 0 |
| 2005 | 0 | 0 |
| 2006 | 1 | 0 |
| 2007 | 0 | 0 |
| 2008 | 0 | 0 |
| 2009 | 0 | 1 |
| 2010 | 0 | 0 |
| 2011 | 0 | 0 |
| 2012 | 0 | 0 |
| 2013 | 0 | 0 |
| 2014 | 0 | 0 |
| 2015 | 0 | 0 |
| 2016 | 0 | 0 |
| 2017 | 0 | 0 |
| 2018 | 0 | 1 |
| 2019 | 0 | 0 |
| 2020 | 0 | 1 |
| 2021 | 1 | 2 |
| 2022 | 2 | 0 |
| 2023 | 0 | 3 |
| 2024 | 0 | 1 |
| 2025 | 2 | 0 |
| 2026 | 1 | 3 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Virus removal membrane and method for manufacturing virus removal membrane5 May 2026US 12,616,940 B2Asahi Kasei Life Science Corporation
- Method for processing recycled cellulose fibers, and processed recycled cellulose fibers17 Jun 2025US 12,331,456 B2Tohoku Seiren Co., Ltd.
- Methods and systems for processing mixed textile feedstock, isolating constituent molecules, and regenerating cellulosic and polyester fibers3 Jun 2025US 12,319,790 B2Evrnu, Spc
- Virus removal membrane and method for manufacturing virus removal membrane8 Nov 2022US 11,491,446 B2Asahi Kasei Medical Co., Ltd.
- Method of obtaining rayon fibers13 Sep 2022US 11,441,264 B1King Abdulaziz University
- Compound phosphorus-nitrogen flame retardant, flame-retardant regenerated cellulose fiber, and preparation method23 Jul 2026US 2026/0209996 A1China Textile Academy
- Algal cellulose fiber16 Jul 2026US 2026/0201610 A1University of Technology, Sydney
- Cellulose fibers, and products using said cellulose fibers23 Apr 2026US 2026/0110115 A1Asahi Kasei Kabushiki Kaisha
- Porous hollow-fiber membrane and method for testing integrity4 Jan 2024US 2024/0001309 A1Asahi Kasei Medical Co., Ltd.
- Method for Processing Recycled Cellulose Fibers, and Processed Recycled Cellulose Fibers26 Oct 2023US 2023/0340722 A1Tohoku Seiren Co., Ltd.
Most cited
By later US patents
- Porous regenerated cellulose hollow fiber and process for preparation thereof21US 4,604,326 AAsahi Kasei Kogyo Kabushiki Kaisha · 1986
- Rayon modified with polymeric amine compounds10US 5,529,585 AHoechst Aktiengesellschaft · 1996
- Method for manufacture of hollow fiber8US 4,444,716 ATerumo Kabushiki Kaisha · 1984
- Aminated cellulosic synthetic fibers7US 5,684,141 AHoechst Aktiengesellschaft · 1997
- Process for the preparation of a porous regenerated cellulose hollow fiber6US 4,822,540 AAsahi Kasei Kogyo Kabushiki Kaisha · 1989