B23B 2215/247
Piston rings
B23B2215/247 (Piston rings) appears on 1 US grants and 2 published applications in this corpus.
Search patents in B23B- Granted patents
- 1
- Published applications
- 2
- Assignees
- 2
- Inventors
- 3
- Latest grant
- 5 Feb 2019
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 2016 | 0 | 1 |
| 2017 | 0 | 0 |
| 2018 | 0 | 0 |
| 2019 | 1 | 0 |
| 2020 | 0 | 1 |
By publication year.
Recent patents
- Sealing element and/or guide ring made of a composition of polytetrafluoroethylene, perfluoroalkoxy polymer, and filler20 Feb 2020US 2020/0056030 A1Burckhardt Compression AG
- Machining Process for Trapezoid Rings With Small Axial Dimensions, Used in Pistons of Internal Combustion Engines28 Jan 2016US 2016/0025219 A1KS Kolbenschmidt GmbH
Most cited
By later US patents