US3303155A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Two-stage heating method for preparing butadiene-styrene latex
Assignee: Ashland LLC
•
Filing: 1962-12-28
•
Granted: 1967-02-07
•
Expires: 1982-12-28
Abstract
No abstract record available.
Inventors
- 👤 William R Peterson
- 👤 Donald A Walker
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 18:42
CPC Classifications
C; C08; C08F; C08F212/00; C08F212/02; C08F212/04; C08F212/06; C08F212/08; C08F36/00; C08F36/02; C08F36/04
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
70 words
A METHOD OF PREPARING A STYRENE-BUTADIENE RESIN LATEX BY THE EMULSION POLYMERIZATION OF A MONOMER CONTAINING BY WEIGHT ABOUT 50-65% OF STYRENE AND ABOUT 50-35% OF BUTADIENE, WHICH COMPRISES INITIALLY CONDUCTING THE POLYMERIZATION AT A TEMPERATURE OF ABOUT 115130*F. FOR A TIME SUFFICIENT TO OBTAIN ABOUT 15-30% MONOMER CONVERSION, AND THEREAFTER CONTINUING THE POLYMERIZATION AT A TEMPERATURE OF ABOUT 145-155%F. UNTIL THE DESIRED DEGREE OF MONOMER CONVERSION HAS BEEN OBTAINED.
Claim 2
Independent Claim
70 words
A METHOD OF PREPARING A STYRENE-BUTADIENE RESIN LATEX BY THE EMULSION POLYMERIZATION OF A MONOMER CONTAINING BY WEIGHT ABOUT 50-65% OF STYRENE AND ABOUT 50-35% OF BUTADIENE, WHICH COMPRISES INITIALLY CONDUCTING THE POLYMERIZATION AT A TEMPERATURE OF ABOUT 115130*F. FOR A TIME SUFFICIENT TO OBTAIN ABOUT 15-30% MONOMER CONVERSION, AND THEREAFTER CONTINUING THE POLYMERIZATION AT A TEMPERATURE OF ABOUT 145-155%F. UNTIL THE DESIRED DEGREE OF MONOMER CONVERSION HAS BEEN OBTAINED.
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) | 1970-02-06 | 1970-08-08 | 1971-02-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-02-06 | 1974-08-08 | 1975-02-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-02-06 | 1978-08-08 | 1979-02-07 | $7700.00 | Window Closed / Lapsed |