E01C 19/21
For simultaneously but separately applying liquid material and granular or pulverulent material
Official title: for simultaneously but separately applying liquid material and granular or pulverulent material, e.g. bitumen and grit, with or without spreading {(with rolling E01C19/4813); for filling grooves and gritting the filling}
E01C19/21 (For simultaneously but separately applying liquid material and granular or pulverulent material) appears on 62 US grants and 49 published applications in this corpus.
Search patents in E01C- Granted patents
- 62
- Published applications
- 49
- Assignees
- 33
- Inventors
- 86
- Latest grant
- 5 May 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 1 | 0 |
| 1977 | 0 | 0 |
| 1978 | 0 | 0 |
| 1979 | 0 | 0 |
| 1980 | 0 | 0 |
| 1981 | 1 | 0 |
| 1982 | 0 | 0 |
| 1983 | 0 | 0 |
| 1984 | 1 | 0 |
| 1985 | 0 | 0 |
| 1986 | 1 | 0 |
| 1987 | 1 | 0 |
| 1988 | 0 | 0 |
| 1989 | 0 | 0 |
| 1990 | 1 | 0 |
| 1991 | 2 | 0 |
| 1992 | 2 | 0 |
| 1993 | 2 | 0 |
| 1994 | 1 | 0 |
| 1995 | 0 | 0 |
| 1996 | 1 | 0 |
| 1997 | 0 | 0 |
| 1998 | 0 | 0 |
| 1999 | 2 | 0 |
| 2000 | 0 | 0 |
| 2001 | 2 | 0 |
| 2002 | 0 | 1 |
| 2003 | 2 | 2 |
| 2004 | 3 | 2 |
| 2005 | 3 | 1 |
| 2006 | 0 | 4 |
| 2007 | 2 | 1 |
| 2008 | 1 | 0 |
| 2009 | 0 | 1 |
| 2010 | 1 | 1 |
| 2011 | 0 | 2 |
| 2012 | 2 | 1 |
| 2013 | 0 | 0 |
| 2014 | 0 | 0 |
| 2015 | 1 | 2 |
| 2016 | 1 | 3 |
| 2017 | 2 | 2 |
| 2018 | 3 | 3 |
| 2019 | 5 | 7 |
| 2020 | 3 | 4 |
| 2021 | 4 | 3 |
| 2022 | 3 | 0 |
| 2023 | 0 | 7 |
| 2024 | 1 | 1 |
| 2025 | 5 | 0 |
| 2026 | 2 | 1 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Method for renovating a roadway and machine for simultaneous spreading of fibres and bitumen emulsion5 May 2026US 12,618,202 B2Colas
- Road paver21 Apr 2026US 12,606,965 B2Ningbo Roaby Technology Industrial Group Co., Ltd.
- Coating system for asphalt and related methods16 Dec 2025US 12,497,514 B2Asphalt Systems, Inc.
- Spreading machines with improved controls2 Sep 2025US 12,404,636 B2E. D. Etnyre & Co.
- Modular dual wall spreader with liquid storage tanks3 Jun 2025US 12,318,802 B2Oy Hilltip AB
- Coating System For Asphalt And Related Methods26 Feb 2026US 2026/0055275 A1Asphalt Systems, Inc.
- Systems and Methods for Automating the Application of Friction-Modifying Coatings4 Jul 2024US 2024/0218614 A1DeAngelo Contracting Services, LLC
- Spreading machines with improved controls3 Aug 2023US 2023/0243111 A1E. D. Etnyre & Co.
- Method for renovating a roadway and machine for simultaneous spreading of fibres and bitumen emulsion22 Jun 2023US 2023/0193569 A1Colas
- Road paver25 May 2023US 2023/0160151 A1Ningbo Roaby Technology Industrial Group Co., Ltd.
Most cited
By later US patents
- Apparatus and system for synchronized application of one or more materials to a surface from a vehicle and control of a vehicle mounted variable positions snow removal device75US 5,904,296 A1999
- Apparatus and system for synchronized application of one or more materials to a surface from a vehicle and control of a vehicle mounted variable position snow removal device69US 6,173,904 B12001
- Roadway paving apparatus62US 5,895,173 AE. D. Etnyre & Co. · 1999
- Vehicle mounted travel surface and weather condition monitoring system61US 6,535,141 B12003
- Apparatus for synchronized spreading of granular and liquid material53US 5,096,125 A1992