US3661835A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for preparing a dispersion of spherical aggregates of amphipathic polymer
Assignee: Imperial Chemical Industries Ltd
•
Filing: 1970-08-07
•
Granted: 1972-05-09
•
Expires: 1990-08-07
Abstract
Abstract PROCESS OF PREPARING DISPERSIONS CONTAINING SPERICAL AGGREGATES OF AMPHIPATHIC COPOLYMER IN WHICH THE COPOLYMER IS DISSOLVED IN A COMMON SOLVENT FOR TWO DIFFERENT POLYMERIC COMPONENTS OF THE COPOLYMER AND CONSTITUENTS OF THIS SOLVENT ARE REMOVED BY DISTILLATION TO LEAVE A SOLVENT FOR ONLY ONE OF THE COMPONENTS. THE DISPERSIONS ARE USEFUL IN COATINGS.
Inventors
- 👤 Alan Stuart Baker
- 👤 Julian Alfred Waters
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 21:57
CPC Classifications
C; C08; C08J; C08J3/00; C08J3/02; C08J3/09; C08F; C08F265/00; C08F265/04
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References 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) | 1975-05-09 | 1975-11-08 | 1976-05-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-05-09 | 1979-11-08 | 1980-05-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-05-09 | 1983-11-08 | 1984-05-09 | $7700.00 | Window Closed / Lapsed |