D21H 21/26
Agents rendering paper transparent or translucent
D21H21/26 (Agents rendering paper transparent or translucent) appears on 23 US grants and 17 published applications in this corpus.
Search patents in D21H- Granted patents
- 23
- Published applications
- 17
- Assignees
- 23
- Inventors
- 71
- Latest grant
- 7 Apr 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1978 | 1 | 0 |
| 1979 | 1 | 0 |
| 1980 | 0 | 0 |
| 1981 | 1 | 0 |
| 1982 | 0 | 0 |
| 1983 | 1 | 0 |
| 1984 | 0 | 0 |
| 1985 | 2 | 0 |
| 1986 | 1 | 0 |
| 1987 | 0 | 0 |
| 1988 | 0 | 0 |
| 1989 | 0 | 0 |
| 1990 | 0 | 0 |
| 1991 | 0 | 0 |
| 1992 | 0 | 0 |
| 1993 | 0 | 0 |
| 1994 | 0 | 0 |
| 1995 | 0 | 0 |
| 1996 | 0 | 0 |
| 1997 | 1 | 0 |
| 1998 | 1 | 0 |
| 1999 | 2 | 0 |
| 2000 | 2 | 0 |
| 2001 | 0 | 0 |
| 2002 | 1 | 0 |
| 2003 | 1 | 2 |
| 2004 | 2 | 1 |
| 2005 | 2 | 1 |
| 2006 | 0 | 1 |
| 2007 | 0 | 2 |
| 2008 | 0 | 0 |
| 2009 | 0 | 1 |
| 2010 | 0 | 0 |
| 2011 | 0 | 2 |
| 2012 | 0 | 0 |
| 2013 | 1 | 0 |
| 2014 | 0 | 0 |
| 2015 | 0 | 0 |
| 2016 | 0 | 1 |
| 2017 | 0 | 0 |
| 2018 | 1 | 0 |
| 2019 | 0 | 0 |
| 2020 | 0 | 0 |
| 2021 | 0 | 0 |
| 2022 | 0 | 0 |
| 2023 | 0 | 3 |
| 2024 | 0 | 0 |
| 2025 | 0 | 1 |
| 2026 | 2 | 2 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Multilayer film comprising highly refined cellulose fibers7 Apr 2026US 12,595,627 B2Stora Enso OYJ
- Fine fibrous cellulose, dispersed solution, sheet, laminated sheet, laminate, and method for producing fine fibrous cellulose17 Feb 2026US 12,553,185 B2Oji Holdings Corporation
- Paper with high covering power22 May 2018US 9,976,257 B2Schoeller Technocell GmbH & Co.KG
- Fiber composite material and method for manufacturing the same12 Feb 2013US 8,372,764 B2Rohm Co., Ltd.
- Method of transparentizing paper subtrate and paper assembly with transparentized window7 Jun 2005US 6,902,770 B1Infoseal L.L.C.
- Dehazing coatings and method for use30 Jul 2026US 2026/0217995 A1Sun Chemical Corporation
- Fine fibrous cellulose, dispersed solution, sheet, laminated sheet, laminate, and method for producing fine fibrous cellulose9 Jul 2026US 2026/0193842 A1Oji Holdings Corporation
- Method for providing moulded air-laid pulp20 Mar 2025US 2025/0092590 A1
- Transparent paper or cardboard substrate and method for its production6 Jul 2023US 2023/0212823 A1
- Fine fibrous cellulose, dispersed solution, sheet, laminated sheet, laminate, and method for producing fine fibrous cellulose29 Jun 2023US 2023/0203755 A1Oji Holdings Corporation
Most cited
By later US patents
- Films made from paper containing cellulose ester fiber59US 5,631,078 AEastman Chemical Company · 1997
- Security features for paper33US 5,928,471 APortals Limited · 1999
- Cellulosic materials rendered transparent32US 4,513,056 AArjomari-Prioux · 1985
- Transparentized paper sheet26US 4,569,888 AAndrews Paper & Chemical Co., Inc. · 1986
- Transparent fibrous sheets20US 4,416,950 AAndrews Paper & Chemical Co., Inc. · 1983