US2849427A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Foam suppression of hot latex emulsions during recovery of monomers therein
Assignee: Phillips Petroleum Co
•
Filing: 1955-08-15
•
Granted: 1958-08-26
•
Expires: 1975-08-15
Abstract
No abstract record available.
Inventors
- 👤 Thomas J Kennedy
- 👤 Bobbie H Smith
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 14:32
CPC Classifications
C; C08; C08F; C08F36/00; C08F36/02; C08F36/04
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
61 words
IN A PROCESS OF EMULSION POLYMERIZATION ABOVE ABOUT 72*F. OF A MONOMER SYSTEM COMPRISING 1,3-BUTADIENE AND STYRENE WHEREIN FOLLOWING FORMATION OF THE LATEX EMULSION AND STOPPING THE POLYMERIZATION THE REMAINING MONOMERS ARE VOLATILIZED FROM THE EMULSION, THE IMPROVEMENT WHICH COMPRISES SUPPRESSING FOAM FORMATION DURING THE VOLATILIZATION BY ADDING A FOAM-SUPPRESSION AMOUNT OF AN AQUEOUS DISPERSION OF ZINC STEARATE TO SAID EMULSION.
Claim 2
Dependent Claim
61 words
IN A PROCESS OF EMULSION POLYMERIZATION ABOVE ABOUT 72*F. OF A MONOMER SYSTEM COMPRISING 1,3-BUTADIENE AND STYRENE WHEREIN FOLLOWING FORMATION OF THE LATEX EMULSION AND STOPPING THE POLYMERIZATION THE REMAINING MONOMERS ARE VOLATILIZED FROM THE EMULSION, THE IMPROVEMENT WHICH COMPRISES SUPPRESSING FOAM FORMATION DURING THE VOLATILIZATION BY ADDING A FOAM-SUPPRESSION AMOUNT OF AN AQUEOUS DISPERSION OF ZINC STEARATE TO SAID EMULSION.
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) | 1961-08-25 | 1962-02-24 | 1962-08-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-08-25 | 1966-02-24 | 1966-08-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-08-25 | 1970-02-24 | 1970-08-26 | $7700.00 | Window Closed / Lapsed |