B29D 30/52
Unvulcanised treads
Official title: Unvulcanised treads, e.g. on used tyres; Retreading (apparatus for forming {treads by extrusion B29C48/00; apparatus for} vulcanising treads B29C35/02; apparatus characterised by the means for holding wheels or parts thereof B60B30/00)
B29D30/52 (Unvulcanised treads) appears on 888 US grants and 775 published applications in this corpus.
Search patents in B29D- Granted patents
- 888
- Published applications
- 775
- Assignees
- 208
- Inventors
- 1,353
- Latest grant
- 28 Jul 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 38 | 0 |
| 1977 | 26 | 0 |
| 1978 | 33 | 0 |
| 1979 | 27 | 0 |
| 1980 | 24 | 0 |
| 1981 | 22 | 0 |
| 1982 | 10 | 0 |
| 1983 | 5 | 0 |
| 1984 | 9 | 0 |
| 1985 | 9 | 0 |
| 1986 | 16 | 0 |
| 1987 | 15 | 0 |
| 1988 | 12 | 0 |
| 1989 | 18 | 0 |
| 1990 | 14 | 0 |
| 1991 | 11 | 0 |
| 1992 | 11 | 0 |
| 1993 | 11 | 0 |
| 1994 | 20 | 0 |
| 1995 | 13 | 0 |
| 1996 | 8 | 0 |
| 1997 | 10 | 0 |
| 1998 | 10 | 0 |
| 1999 | 12 | 0 |
| 2000 | 8 | 0 |
| 2001 | 13 | 3 |
| 2002 | 12 | 29 |
| 2003 | 12 | 11 |
| 2004 | 11 | 24 |
| 2005 | 17 | 23 |
| 2006 | 17 | 23 |
| 2007 | 6 | 26 |
| 2008 | 7 | 21 |
| 2009 | 10 | 38 |
| 2010 | 6 | 40 |
| 2011 | 12 | 29 |
| 2012 | 23 | 30 |
| 2013 | 19 | 55 |
| 2014 | 28 | 48 |
| 2015 | 19 | 44 |
| 2016 | 31 | 51 |
| 2017 | 33 | 46 |
| 2018 | 27 | 32 |
| 2019 | 38 | 34 |
| 2020 | 28 | 28 |
| 2021 | 32 | 20 |
| 2022 | 18 | 30 |
| 2023 | 15 | 23 |
| 2024 | 21 | 28 |
| 2025 | 24 | 21 |
| 2026 | 17 | 18 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
- B29D 30/54Retreading446
- B29D 30/58Applying bands of rubber treads, i.e. applying camel backs278
- B29D 30/68Cutting profiles into the treads of tyres70
- B29D 2030/526The tread comprising means for discharging the electrostatic chargeIndexing code69
- B29D 30/66Moulding treads on to tyre casings65
- B29D 2030/523Ring-shaped treadsIndexing code55
- B29D 30/64Tyre spreaders2
Recent patents
- Methods for retreading tires28 Jul 2026US 12,691,651 B2Bridgestone Americas Tire Operations, LLC
- Versatile sipe machine28 Jul 2026US 12,691,652 B2Bridgestone Bandag, LLC
- System and method for stabilizing lateral wings of precured tread during cementing21 Jul 2026US 12,686,191 B2Continental Reifen Deutschland GmbH
- Studded winter tire21 Jul 2026US 12,686,234 B2Nokian Renkaat Oyj
- Method for constructing the tread of a tire, device configured for performing the method and uncured rubber strip7 Jul 2026US 12,673,473 B2VM Holding B.V.
- Quinolineimine antidegradant compounds and uses thereof24 Sep 2026US 2026/0285812 A1Flexsys IP Holdings, LLC
- Versatile sipe machine17 Sep 2026US 2026/0273883 A1Bridgestone Bandag, LLC
- Radial expanding tire bead sealing ring assembly3 Sep 2026US 2026/0257442 A1Tripoint LLC (dba Presti Industries)
- Tire having a tread that is formed in full or in part from a composite material of unitary molded construction27 Aug 2026US 2026/0249651 A1
- Device and method for the additive manufacture of a three-dimensional object23 Jul 2026US 2026/0208443 A1Compagnie Generale Des Etablissements Michelin
Most cited
By later US patents
- Structure having nano-fibers on annular curved surface, method of making same and method of using same to adhere to a surface81US 7,175,723 B2The Regents of the University of California · 2007
- Method and apparatus of manufacturing a tire by the laying of rubber products onto a firm support48US 4,963,207 ACompagnie Generale Des Etablissements Michelin · 1990
- Extrusion line control system41US 4,097,566 ANucleonics Data Systems · 1978
- Control system for an elastomer extrusion and applicator apparatus39US 4,240,863 ACaterpillar Tractor Co. · 1980
- Method of manufacturing tire39US 5,942,069 ASP Reifenwerke GmbH · 1999