Multi-component disappearing tripping ball and method for making the same
US8327931B2 · kind B2 · utility
98Cited by
364References
34Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Dec 8, 2009 |
| Grant date | Dec 11, 2012 |
| Priority date | — |
| Expiry date | Oct 14, 2030 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T428/12104
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
A tripping ball including two or more dissolution resistant parts of a ball and an adherent dissolvable material binding the two or more parts of the ball together. A method for making a tripping ball is also included.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.