C04B 20/0052
Mixtures of fibres of different physical characteristics
Official title: {Mixtures of fibres of different physical characteristics, e.g. different lengths}
C04B20/0052 (Mixtures of fibres of different physical characteristics) appears on 22 US grants and 16 published applications in this corpus.
Search patents in C04B- Granted patents
- 22
- Published applications
- 16
- Assignees
- 16
- Inventors
- 54
- Latest grant
- 13 Jan 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1978 | 1 | 0 |
| 1979 | 0 | 0 |
| 1980 | 0 | 0 |
| 1981 | 1 | 0 |
| 1982 | 0 | 0 |
| 1983 | 0 | 0 |
| 1984 | 0 | 0 |
| 1985 | 0 | 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 | 2 | 0 |
| 1996 | 0 | 0 |
| 1997 | 1 | 0 |
| 1998 | 0 | 0 |
| 1999 | 0 | 0 |
| 2000 | 1 | 0 |
| 2001 | 0 | 0 |
| 2002 | 0 | 0 |
| 2003 | 0 | 0 |
| 2004 | 0 | 0 |
| 2005 | 0 | 2 |
| 2006 | 1 | 1 |
| 2007 | 2 | 0 |
| 2008 | 1 | 1 |
| 2009 | 0 | 0 |
| 2010 | 1 | 0 |
| 2011 | 0 | 0 |
| 2012 | 0 | 1 |
| 2013 | 1 | 0 |
| 2014 | 0 | 3 |
| 2015 | 1 | 0 |
| 2016 | 1 | 1 |
| 2017 | 0 | 1 |
| 2018 | 2 | 1 |
| 2019 | 1 | 1 |
| 2020 | 1 | 0 |
| 2021 | 1 | 0 |
| 2022 | 0 | 0 |
| 2023 | 0 | 1 |
| 2024 | 1 | 1 |
| 2025 | 0 | 1 |
| 2026 | 1 | 1 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Concrete compositions and apparatuses employing the same13 Jan 2026US 12,522,535 B2Lehigh University
- Fire resistant fibre cement compositions30 Jan 2024US 11,884,590 B2Swisspearl Group AG
- Compositions and methods for the introduction of reinforcement fibers in portland and asphalt cement concrete5 Jan 2021US 10,882,789 B2Forta Corporation
- Blended fibers in an engineered cementitious composite21 Jan 2020US 10,538,457 B2James Hardie Technology Limited
- Compositions and methods for the introduction of reinforcement fibers in portland and asphalt cement concrete3 Sep 2019US 10,399,903 B2Forta Corporation
- Fibre for concrete reinforcement with cross deformation6 Aug 2026US 2026/0226742 A1Optimet Concrete Products Inc.
- Method for Producing Fiber Reinforced, Pozzolan-Coated Reinforcement Bar19 Jun 2025US 2025/0198152 A1
- Concrete compositions and apparatuses employing the same11 Jan 2024US 2024/0010554 A1Lehigh University
- Fire resistant fibre cement compositions22 Jun 2023US 2023/0192547 A1Swisspearl Group AG
- Compositions and methods for the introduction of reinforcement fibers in portland and asphalt cement concrete14 Nov 2019US 2019/0345063 A1Forta Corporation
Most cited
By later US patents
- Method for the production of a fiber-reinforced hydraulically setting material73US 4,306,911 AAmiantus, (A.G.) · 1981
- Graded fiber design and concrete reinforced therewith53US 5,456,752 ASynthetic Industries, Inc. · 1995
- Fiber-reinforced concrete and reinforcing material for concrete51US 4,565,840 AMitsui Petrochemical Industries, Ltd. · 1986
- Graded fiber design and concrete reinforced therewith43US 5,628,822 ASynthetic Industries, Inc. · 1997
- Fibre reinforcing composites21US 4,076,884 AThe Governing Council of the University of Toronto · 1978