| 2022/0349,664 | HEAT EXCHANGER CLEANING SYSTEM AND HEAT EXCHANGER CLEANING METHOD | Sep 11, 19 | Nov 03, 22 | Not available |
| 2022/0333,881 | HORIZONTAL COLLECTING-WHILE-SENDING-BALL WATER SEPARATOR | Sep 20, 19 | Oct 20, 22 | Not available |
| 2022/0305,532 | Cleaning Coke Deposits from Process Equipment | Jun 13, 22 | Sep 29, 22 | Not available |
| 2022/0260,328 | CLEANING BALL AND METHOD FOR MANUFACTURING SAME | Dec 21, 20 | Aug 18, 22 | Not available |
| 2021/0396,482 | HEAT EXCHANGER END COVER INTEGRATED WITH RUBBER BALL CLEANING APPARATUS | Jul 19, 19 | Dec 23, 21 | GUANGZHOU MARTON ENVIRONMENTAL TECHNOLOGY CO., LTD. |
| 2020/0370,848 | IN-PROCESS CLEANING OF THE EXTERNAL SURFACES OF HEAT-TRANSFER TUBES USING A DRY MIXTURE OF SOLID POWDER AND GASES | May 20, 20 | Nov 26, 20 | SENTRO Technologies USA, LLC |
| 2019/0264,994 | Tube Cleaning Gun with Self-Sealing Nozzle | Feb 28, 18 | Aug 29, 19 | Projectile Tube Cleaning, Inc. |
| 2019/0049,198 | Multi-Nozzle Mechanical Tube Cleaning System | Aug 11, 17 | Feb 14, 19 | Projectile Tube Cleaning, Inc. |
| 2018/0372,433 | Heat exchanger cleaning installation and associated system | Jun 22, 18 | Dec 27, 18 | Not available |
| 2018/0363,996 | CONDUIT PIG | Jan 30, 17 | Dec 20, 18 | Not available |
| 2018/0356,170 | BLOCKING ELEMENTS FOR BALL TRAP SCREEN | Aug 17, 18 | Dec 13, 18 | Not available |
| 2018/0180,365 | SYSTEM FOR INTERCEPTING AND COLLECTING CLEANING BODIES BY ALTERNATING SWEEPING | Jun 24, 16 | Jun 28, 18 | Not available |
| 2017/0138,679 | CONDENSER TUBE CLEANING APPARATUS | Oct 26, 16 | May 18, 17 | DOOSAN HEAVY INDUSTRIES & CONSTRUCTION CO., LTD. |
| 2017/0131,048 | ON-LINE CLEANING OF A HEAT EXCHANGER TUBING USING A BRUSH AND A FLOW DIVERTER | Jun 09, 15 | May 11, 17 | BACK PORCH HOLDINGS, INC. |
| 2017/0016,686 | COMPLEX CLEANING SYSTEM FOR HEAT EXCHANGER | Jun 23, 14 | Jan 19, 17 | GEESCO CO., LTD. |
| 2016/0084,594 | RUBBER BALL CLEANING MULTIPOINT CENTRALIZED BALL SERVING SYSTEM FOR CONDENSER | May 19, 14 | Mar 24, 16 | SHAANXI HAND ENERGY CONSERVATION AND ENVIRONMENTAL PROTECTION TECHNOLOGY CO., LTD |
| 2016/0076,832 | Blocking Elements for Ball Trap Screen | May 22, 14 | Mar 17, 16 | C.Q.M. LTD. |
| 2016/0061,533 | HEAT STORAGE SYSTEM | Nov 12, 15 | Mar 03, 16 | IHI CORPORATION |
| 2015/0247,687 | APPARATUS FOR CIRCULATING BALLS FOR CLEANING A PIPE LINE | Sep 23, 13 | Sep 03, 15 | Jeongwoo Industrial Machine Co., Ltd. |
| 2013/0219,638 | CLEANING SYSTEM | Oct 01, 10 | Aug 29, 13 | HVS ENGINEERING PTE LTD |