US3190868A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Recovery of polymer from solution
Assignee: Phillips Petroleum Co
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Filing: 1960-10-20
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Granted: 1965-06-22
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Expires: 1980-10-20
Abstract
No abstract record available.
Inventors
- 👤 Mitacek John
- 👤 Edward N Pennington
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 07:25
CPC Classifications
C; C08; C08C; C08C2/00; C08C2/06
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
109 words
IN THE PROCESS OF RECOVERING A RUBBERY POLYMER PREPARED BY POLYMERIZING A MONOMER MIXTURE CONTAINING AT LEAST A MAJOR PROPORTION OF A CONJUGATED DIENE FROM A SOLUTION THEREOF IN A SOLVENT BY STEAM STRIPPING TO PRODUCE RUBBER CRUMB IN THE AQUEOUS PHASE, THE IMPROVEMENT COMPRISING ADDING DURING SAID STRIPPING (1) A DISPERSING AGENT SELECTED FROM THE GROUP CONSISTING OF WATER SOLUBLE POLYMERIC SUBSTANCES CONTAINING A CARBON CHAIN HAVING A PLURALITY OF -COOH GROUPS, WATER SOLUBLE DERIVATIVES OF POLYMERIC SUBSTANCES CONTAINING A CARBON CHAIN HAVING A PLURALITY OF -COOH GROUPS, AND (2) IONS OF A METAL SELECTED FROM THE GROUP CONSISTING OF CALCIUM, STRONTIUM, BARIUM, ALUMINUM, IRON, COBALT AND NICKEL.
Claim 2
Dependent Claim
109 words
IN THE PROCESS OF RECOVERING A RUBBERY POLYMER PREPARED BY POLYMERIZING A MONOMER MIXTURE CONTAINING AT LEAST A MAJOR PROPORTION OF A CONJUGATED DIENE FROM A SOLUTION THEREOF IN A SOLVENT BY STEAM STRIPPING TO PRODUCE RUBBER CRUMB IN THE AQUEOUS PHASE, THE IMPROVEMENT COMPRISING ADDING DURING SAID STRIPPING (1) A DISPERSING AGENT SELECTED FROM THE GROUP CONSISTING OF WATER SOLUBLE POLYMERIC SUBSTANCES CONTAINING A CARBON CHAIN HAVING A PLURALITY OF -COOH GROUPS, WATER SOLUBLE DERIVATIVES OF POLYMERIC SUBSTANCES CONTAINING A CARBON CHAIN HAVING A PLURALITY OF -COOH GROUPS, AND (2) IONS OF A METAL SELECTED FROM THE GROUP CONSISTING OF CALCIUM, STRONTIUM, BARIUM, ALUMINUM, IRON, COBALT AND NICKEL.
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) | 1968-06-21 | 1968-12-21 | 1969-06-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-06-21 | 1972-12-21 | 1973-06-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-06-21 | 1976-12-21 | 1977-06-22 | $7700.00 | Window Closed / Lapsed |