Triggered polymer viscous pill and methods of using the same
US8579030B2 · kind B2 · utility
1Cited by
2References
23Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Dec 22, 2010 |
| Grant date | Nov 12, 2013 |
| Priority date | — |
| Expiry date | Sep 30, 2031 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC09K8/74
- WIPO fieldPharmaceuticals
- WIPO sectorChemistry
Abstract
The invention provides a method comprising providing a composition comprising a pH trigger and a polymer able to be hydrated in a defined pH zone; injecting the composition with a pH outside the defined pH zone; triggering the pH trigger to adjust the pH of the composition within the defined pH zone; and allowing viscosity of the composition to increase and form a plug.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.