US3793245A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for the preparation of a polymer dispersion in an inert organic liquid
Assignee: Dulux Australia Ltd
•
Filing: 1971-06-02
•
Granted: 1974-02-19
•
Expires: 1991-06-02
Abstract
Abstract A PROCESS OF PREPARING A DISPERSION OF POLYMERIZED A,B-ETHYLENICALLY UNSATURATED MONOMER IN AN INERT ORGANIC LIQUID, IN A TWO-STAGE PROCESS CONSISTING OF A SEED STAGE AND A FEED STAGE. FROM 7-70% BY WEIGHT OF THE TOTAL POLYMERIZABLE MONOMER IS FIRST POLYMERIZED IN THE LIQUID IN THE PRESENCE OF COPOLYMERIZABLE POLYMERIC STABILIZER THE WEIGHT PROPORTION OF FROM 1:10 TO 15:1 AS THE SEED STAGE. THE REMAINING MONOMER IS THEN ADDED TO AND POLYMERIZED IN THE SEED STAGE IN THE PRESENCE OF SEED STAGE STABILIZER, THE TOTAL WEIGHT OF POLYMERIC STABILIZER IN THE DISPERSION BEING FROM 0.5-50% BY WEIGHT OF THE WEIGHT OF DISPERSE POLYMER.
Inventors
- 👤 M Clarke
- 👤 L Filipowicz
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 21:13
CPC Classifications
C; C08; C08F; C08F2/00; C08F2/04; C08F2/06; C08F2/08
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) | 1977-02-18 | 1977-08-20 | 1978-02-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-02-18 | 1981-08-20 | 1982-02-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-02-18 | 1985-08-20 | 1986-02-19 | $7700.00 | Window Closed / Lapsed |