Dispersions of particulate solids in either lipophilic or hydrophilic liquids stabilized with a polymeric amphipathic stabiliser and process for preparing said dispersions
Abstract
Abstract A PROCESS OF PREPARING STABLE DISPERSIONS OF PARTICULATE SOLIDS IN EITHER LIPOPHILLIC OR HYDROPHILIC LIQUIDS BY DISPERSING THE SOLIDS IN THE LIQUID IN THE PRESENCE OF A POLYMERIC AMPHIPATHIC STABILISER WHICH ASSOCIATES WITH THE SURFACE OF THE PARTICLES AND PROVIDES A SOLVATED STERIC BARRIER AROUND THEM. THE STABILISERS COMPRISE AT LEAST ONE CHAINLIKE COMPONENT SOLVATABLE BY A LIPOPHILIC LIQUID AND WITH A CHAIN-LENGTH EQUIVALENT TO AT LEAST 12 COVALENT LINKS TOGETHER WITH AT LEAST ONE COMPONENT SOLVATABLE BY A HYDROPHILIC LIQUID, EACH COMPONENT BEING PRESENT IN THE WEIGHT PROPORTION OF AT LEAST 25% OF THE TOTAL WEIGHT OF STABILISER. THE STABILISERS MAY COMPRISE UP TO 10% BY WEIGHT OF IONIZABLE GROUPS, PREFERABLY CO-REACTED WITH COUNTER-IONS SOLVATABLY BY A HYDROPHILIC LIQUID.
Inventors
- 👤 Michael Raymond Clarke
- 👤 Leon Filipowicz
Bibliographic Details
Claims Analysis
Total Claims: 0References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-05-24 | 1974-11-23 | 1975-05-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-05-24 | 1978-11-23 | 1979-05-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-05-24 | 1982-11-23 | 1983-05-25 | $7700.00 | Window Closed / Lapsed |