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US3393162A
Expired / Lapsed
US
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Block and graft copolymer coated pigments
Assignee: Imperial Chemical Industries Ltd
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Filing: 1962-10-04
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Granted: 1968-07-16
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Expires: 1982-10-04
Abstract
No abstract record available.
Inventors
- 👤 Cox George Harold
- 👤 Osmond Desmond Wilfrid John
- 👤 Heath Iver
- 👤 Skinner Maurice Wainwright
- 👤 Young Charles Harold
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 16:45
CPC Classifications
C; C09; C09B; C09B67/00; C09B67/0001; C09B67/0004; C09B67/0008; C09B67/0013; C08; C08F; C08F2/00; C08F2/04; C08F2/06; C08F2/08; C09C; C09C3/00; C09C3/10; C01; C01P; C01P2004/00; C01P2004/50
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
111 words
A PROCESS FOR COATING SOLID PARTICLES WITH ORGANIC POLYMERIC MATERIAL WHICH COMPRISES DISPERSING SAID PARTICLES IN LIQUID CONTAINING IN SOLUTION A MATERIAL SELECTED FROM THE GROUP CONSISTING OF BLOCK AND GRAFT COPOLYMERS. SAID COPOLYMERS COMPRISING POLYMERIC COMPONENTS OF DIFFERENT DEGREES OF POLARITY, SAID LIQUID BEING A SOLVENT FOR ALL OF SID POLYMERIC COMPONENTS AND THEREAFTER MODIFYING THE POLARITY OF THE LIQUID TO PRECIPITATE AT LEAST ONE, BUT NOT ALL, OF SAID POLYMERIC COMPONENTS ON SAID PARTICLES, THE NON-PRECIPITATED POLYMERIC COMPONENT OF SAID COPOLYMER REMAINING SOLVATED IN THE LIQUID, WHEREBY SAID MATERIAL SELECTED FROM THE GROUP CONSISTING OF BLOCK AND GRAFT COPOLYMERS THEREAFTER FUNCTIONS AS A DISPERSION STABILIZER FOR THE DISPERSED PARTICLES.
Claim 2
Dependent Claim
111 words
A PROCESS FOR COATING SOLID PARTICLES WITH ORGANIC POLYMERIC MATERIAL WHICH COMPRISES DISPERSING SAID PARTICLES IN LIQUID CONTAINING IN SOLUTION A MATERIAL SELECTED FROM THE GROUP CONSISTING OF BLOCK AND GRAFT COPOLYMERS. SAID COPOLYMERS COMPRISING POLYMERIC COMPONENTS OF DIFFERENT DEGREES OF POLARITY, SAID LIQUID BEING A SOLVENT FOR ALL OF SID POLYMERIC COMPONENTS AND THEREAFTER MODIFYING THE POLARITY OF THE LIQUID TO PRECIPITATE AT LEAST ONE, BUT NOT ALL, OF SAID POLYMERIC COMPONENTS ON SAID PARTICLES, THE NON-PRECIPITATED POLYMERIC COMPONENT OF SAID COPOLYMER REMAINING SOLVATED IN THE LIQUID, WHEREBY SAID MATERIAL SELECTED FROM THE GROUP CONSISTING OF BLOCK AND GRAFT COPOLYMERS THEREAFTER FUNCTIONS AS A DISPERSION STABILIZER FOR THE DISPERSED PARTICLES.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1971-07-16 | 1972-01-15 | 1972-07-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-07-16 | 1976-01-15 | 1976-07-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-07-16 | 1980-01-15 | 1980-07-16 | $7700.00 | Window Closed / Lapsed |