US2575135A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Metal mercaptides as modifiers in emulsion polymerization
Assignee: Phillips Petroleum Co
•
Filing: 1947-12-19
•
Granted: 1951-11-13
•
Expires: 1967-12-19
Abstract
No abstract record available.
Inventors
- 👤 Walter A Schulze
- 👤 Wille W Crosch
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 14:19
CPC Classifications
C; C08; C08F; C08F36/00; C08F36/02; C08F36/04
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
97 words
IN THE POLYMERIZATION OF A MONOMERIC MATERIAL DISPERSED IN AN AQUEOUS EMULSION IN THE PRESENCE OF A SOAP EMULSIFYING AGENT AND COMPRISING A MAJOR PROPORTION OF AN ALIPHATIC CONJUGATED DIENE TO PRODUCE SYNTHETIC RUBBER, THE IMPROVEMENT WHICH COMPRISES CONDUCTING SAID POLYMERIZATION IN THE PRESENCE OF AN ADDED METAL ALKYL MERCAPTIDE HAVING AT LEAST 8 AND NOT MORE THAN 16 CARBON ATOMS PER ALKYL GROUP AND IN WHICH SAID METAL IS OF THE GROUP CONSISTING OF SILVER, ZINC, CADMIUM, MERCURY AND LEAD, IN AN AMOUNT BETWEEN 0.1 AND 1.5 PARTS BY WEIGHT PER 100 PARTS OF MONOMERIC MATERIAL.
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) | 1954-11-12 | 1955-05-14 | 1955-11-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-11-12 | 1959-05-14 | 1959-11-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-11-12 | 1963-05-14 | 1963-11-13 | $7700.00 | Window Closed / Lapsed |