B21H 3/08
Internal screw-threads
Official title: internal screw-threads
B21H3/08 (Internal screw-threads) appears on 39 US grants and 30 published applications in this corpus.
Search patents in B21H- Granted patents
- 39
- Published applications
- 30
- Assignees
- 36
- Inventors
- 90
- Latest grant
- 29 Jul 2025
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 1 | 0 |
| 1977 | 0 | 0 |
| 1978 | 1 | 0 |
| 1979 | 1 | 0 |
| 1980 | 0 | 0 |
| 1981 | 0 | 0 |
| 1982 | 0 | 0 |
| 1983 | 0 | 0 |
| 1984 | 2 | 0 |
| 1985 | 3 | 0 |
| 1986 | 0 | 0 |
| 1987 | 2 | 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 | 0 | 0 |
| 1998 | 2 | 0 |
| 1999 | 1 | 0 |
| 2000 | 1 | 0 |
| 2001 | 2 | 0 |
| 2002 | 1 | 0 |
| 2003 | 1 | 0 |
| 2004 | 0 | 0 |
| 2005 | 0 | 1 |
| 2006 | 1 | 1 |
| 2007 | 0 | 0 |
| 2008 | 0 | 1 |
| 2009 | 0 | 0 |
| 2010 | 0 | 1 |
| 2011 | 1 | 1 |
| 2012 | 0 | 0 |
| 2013 | 0 | 2 |
| 2014 | 1 | 1 |
| 2015 | 1 | 2 |
| 2016 | 1 | 2 |
| 2017 | 2 | 3 |
| 2018 | 0 | 3 |
| 2019 | 3 | 3 |
| 2020 | 3 | 1 |
| 2021 | 1 | 1 |
| 2022 | 4 | 1 |
| 2023 | 0 | 0 |
| 2024 | 2 | 2 |
| 2025 | 1 | 4 |
By publication year. Applications have been published since 2001.
Recent patents
- Threaded nut of a ball screw and method for producing same29 Jul 2025US 12,372,142 B2Schaeffler Technologies AG & Co. KG
- Threaded nut of a ball screw drive, and method for producing same27 Aug 2024US 12,072,005 B2Schaeffler Technologies AG & Co. KG
- Method for producing a ball raceway on a workpiece and a ball screw nut having a ball raceway thus produced9 Apr 2024US 11,951,527 B2Schaeffler Technologies AG & Co. KG
- Tubular coupling11 Oct 2022US 11,466,800 B2Certus Energy Solutions, LLC
- Screw thread roller burnishing apparatus30 Aug 2022US 11,426,835 B2Knust-Godwin LLC
- Thread forming apparatus and associated method13 Nov 2025US 2025/0345839 A1Stolle Machinery Company, LLC
- Thread Forming Apparatus And Associated Method13 Nov 2025US 2025/0345840 A1Stolle Machinery Company, LLC
- Thread Forming Apparatus And Associated Method13 Nov 2025US 2025/0345842 A1Stolle Machinery Company, LLC
- Female thread repairing tool23 Jan 2025US 2025/0025954 A1
- Threaded nut of a ball screw and method for producing same1 Feb 2024US 2024/0035553 A1Schaeffler Technologies AG & Co. KG
Most cited
By later US patents
- Nut25US 9,624,962 B2HEWI G. Winker GmbH & Co. KG · 2017
- Rock bolt and method of installing a rock bolt22US 6,033,153 AIndustrial Rollformers Pty. Ltd. · 2000
- Method of making plug-containing type internally threaded anchor21US 4,653,132 AKensetsu Fastener Kabushiki Kaisha · 1987
- Ball screwed nut, linearly guiding apparatus using the same, ball screw for steering and method of manufacturing the ball screwed nut15US 6,334,370 B12002
- Method for forming on workpiece resilient thread having closed helical cavity inside the thread11US 4,491,002 A1985