A45D 7/00
Processes of waving, straightening or curling hair
A45D7/00 (Processes of waving, straightening or curling hair) appears on 556 US grants and 794 published applications in this corpus.
Search patents in A45D- Granted patents
- 556
- Published applications
- 794
- Assignees
- 206
- Inventors
- 1,166
- Latest grant
- 8 Sep 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 6 | 0 |
| 1977 | 6 | 0 |
| 1978 | 4 | 0 |
| 1979 | 1 | 0 |
| 1980 | 7 | 0 |
| 1981 | 9 | 0 |
| 1982 | 2 | 0 |
| 1983 | 3 | 0 |
| 1984 | 4 | 0 |
| 1985 | 6 | 0 |
| 1986 | 7 | 0 |
| 1987 | 5 | 0 |
| 1988 | 1 | 0 |
| 1989 | 4 | 0 |
| 1990 | 8 | 0 |
| 1991 | 8 | 0 |
| 1992 | 6 | 0 |
| 1993 | 4 | 0 |
| 1994 | 3 | 0 |
| 1995 | 4 | 0 |
| 1996 | 7 | 0 |
| 1997 | 3 | 0 |
| 1998 | 9 | 0 |
| 1999 | 4 | 0 |
| 2000 | 6 | 0 |
| 2001 | 5 | 0 |
| 2002 | 7 | 4 |
| 2003 | 8 | 15 |
| 2004 | 4 | 10 |
| 2005 | 1 | 8 |
| 2006 | 4 | 10 |
| 2007 | 2 | 10 |
| 2008 | 0 | 14 |
| 2009 | 7 | 12 |
| 2010 | 3 | 26 |
| 2011 | 5 | 16 |
| 2012 | 7 | 26 |
| 2013 | 19 | 46 |
| 2014 | 22 | 53 |
| 2015 | 32 | 104 |
| 2016 | 34 | 79 |
| 2017 | 42 | 66 |
| 2018 | 28 | 54 |
| 2019 | 29 | 43 |
| 2020 | 39 | 38 |
| 2021 | 40 | 31 |
| 2022 | 32 | 29 |
| 2023 | 11 | 34 |
| 2024 | 18 | 23 |
| 2025 | 20 | 26 |
| 2026 | 10 | 17 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
- A45D 7/04Chemical207
- A45D 7/06Combined chemical and thermal173
- A45D 7/02Thermal101
- A45D 2007/002Processes of dressing hairIndexing code80
- A45D 2007/007Processes of trimming or cutting hair for hairdressing purposesIndexing code11
- A45D 2007/005Processes or methods of undoing hair, i.e. removing a hair dressingIndexing code9
Recent patents
- Systems and methods for unraveling braids8 Sep 2026US 12,727,654 B2Swella Inc.
- Methods and systems for a hair lengthening device18 Aug 2026US 12,708,185 B2
- Process for permanent waving keratin fibers30 Jun 2026US 12,667,175 B2Kao Germany GmbH
- Keratin-based hair straightening formulations, methods and systems19 May 2026US 12,629,327 B2Beauty Biolabs LLC
- Method for treating the hair14 Apr 2026US 12,599,212 B2L'oreal
- Methods and systems for a hair lengthening device1 Oct 2026US 2026/0294065 A1
- Cosmetic systems for structural modification of hair fibers using lignin starch nanoparticles1 Oct 2026US 2026/0294776 A1
- Hair Interlocking Device24 Sep 2026US 2026/0283322 A1
- Process for Curling Eyelashes Using a Composition Comprising Cysteine and an Organic Base6 Aug 2026US 2026/0224461 A1L'oreal
- Systems and Methods of Altering Hair Texture23 Jul 2026US 2026/0206934 A1
Most cited
By later US patents
- Spiral hair curling iron66US 8,132,571 B12012
- Self-molding permanent agent and method for proceeding free-rod and free-band type permanent52US 8,613,913 B2Korea Research Institute of Chemical Technology · 2013
- Keratin treatment formulations and methods50US 9,326,926 B2Liqwd, Inc. · 2016
- Method of waving hair45US 5,771,906 A1998
- Hair styling aid44US 8,607,804 B2Tf3 Limited · 2013