- All sections
- F - Mechanical engineeringlightingheatingweaponsblasting
- F16J - Pistonscylinderspressure vessels in generalsealings
- F16J 15/28 - Sealings between relatively-moving surfaces with stuffing-boxes for rigid sealing rings with sealing rings made of metal
Patent holdings for IPC class F16J 15/28
Total number of patents in this class: 84
10-year publication summary
|
3
|
11
|
7
|
11
|
6
|
9
|
2
|
1
|
10
|
3
|
| 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 | 2026 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| Hoerbiger Wien GmbH | 137 |
7 |
| Burckhardt Compression AG | 126 |
6 |
| Halliburton Energy Services, Inc. | 21309 |
5 |
| Pratt & Whitney Canada Corp. | 5517 |
2 |
| NTN Corporation | 4925 |
2 |
| Aker Subsea AS | 126 |
2 |
| Amsted Rail Company, Inc. | 416 |
2 |
| EXCO Technologies Limited | 54 |
2 |
| John Crane Inc. | 104 |
2 |
| Kabushiki Kaisha Kobe Seiko Sho (Kobe Steel, Ltd.) | 2836 |
2 |
| Saint-Gobain Performance Plastics Corporation | 1051 |
2 |
| Technetics Group LLC | 44 |
2 |
| Kerr Machine Co. | 177 |
2 |
| Nuovo Pignone Tecnologie S.r.l. | 1223 |
2 |
| EGC Operating Company LLC dba EGC Enterprises, Inc. | 4 |
2 |
| Rtx Corporation | 10127 |
2 |
| Baker Hughes Incorporated | 4905 |
1 |
| ExxonMobil Research And Engineering Company | 2400 |
1 |
| Chevron U.S.A. Inc. | 4159 |
1 |
| Air Products and Chemicals, Inc. | 1469 |
1 |
| Other owners | 36 |