Patent US2346020A successfully refreshed from Google Patents.
US3784498A
Expired / Lapsed
US
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Process for preparing low emulsifier synthetic latex
Assignee: BASF SE
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Filing: 1972-04-21
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Granted: 1974-01-08
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Expires: 1992-04-21
Abstract
Abstract A TWO-STEP PROCESS FOR PREPARING LATICES CONTAINING A SMALL AMOUNT (0.1%) OR NO EMULSIFIER COMPRISING (1) POLYMERIZING A 20-30% PORTION OF ONE OR MORE MONOMERS WITH FROM 1-5% BY WEIGHT BASED ON TOTAL MONOMERS OF AN ETHYLENICALLY UNSATURATED CARBOXYLIC ACID IN AQUEOUS ACIDIC EMULSION, AND (2) ADJUSTING THE PH T 7.:-10.0 WITH AQUEOUS AMMONIA, ADDING THE REMAINING PORTION OF MONOMERS AND POLYMERIZING IN AQUEOUS BASIC EMULSION TO COMPLETS CONVERSION.
Inventors
- 👤 G Ceska
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 06:42
CPC Classifications
C; C08; C08F; C08F2/00; C08F2/12; C08F2/16; C08F2/22; C08F2/24; C08F265/00; C08F265/10; C08F267/00; C08F267/02
Claims Analysis
Total Claims: 0
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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) | 1977-01-07 | 1977-07-09 | 1978-01-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-01-07 | 1981-07-09 | 1982-01-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-01-07 | 1985-07-09 | 1986-01-08 | $7700.00 | Window Closed / Lapsed |