US2613201A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Concentration of partially polymerized diallyl phthalate
Assignee: Shell Development Co
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Filing: 1947-04-21
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Granted: 1952-10-07
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Expires: 1967-04-21
Abstract
No abstract record available.
Inventors
- 👤 Anderson John
- 👤 John W Mecorney
- 👤 George E Ham
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 07:27
CPC Classifications
C; C08; C08F; C08F6/00; C08F6/26
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
143 words
A PROCESS FOR PRODUCING A CONCENTRATED SOLUTION OF DIALLYL PHTHALATE PARTIAL POLYMERS COMPRISING POLYMERIZING DIALLYL PHTHALATE IN A POLYMERIZATION ZONE UNTIL POLYMERIZATION IS FROM 20% TO 40% COMPLETE, CONTACTING THE PARTIAL POLYMER SO PRODUCED WITH FROM 2.5 TO 12 VOLUMES PER VOLUME OF PARTIAL POLYMER OF A DUAL SOLVENT, SAID DUAL SOLVENT CONTAINING FROM 65% TO 85% ACETONE AND THE BALEANCE WATER, WHEREBY TWO PHASES ARE FROMED, SEPARATING THE PHASES AND SUBJECTING THE UPPER PHASE TO STEAM STRIPPING WHEREBY AN OVERHEAD FRACTION IS PRODUCED COMPRISING DUAL SOLVENT AND A BOTTOMS IS PRODUCED CONTAINING WATER AND DIALLYL PHTHALATE MONOMER, SEPARATING THE WATER FROM THE MONOMER AND RETURNING THE MONOMER TO THE POLYMERIZATION VESSEL, CONTACTING THE LOWER PHASE FROM 2.5 TO 12 VOLUMES PER VOLUME OF PARTIAL POLYMER OF AN ACETONE-WATER DUAL SOLVENT CONTAINIG FROM 80% TO 87 1/2% ACETONE TO AGAIN FORM TWO PHASES,
Claim 2
Dependent Claim
143 words
A PROCESS FOR PRODUCING A CONCENTRATED SOLUTION OF DIALLYL PHTHALATE PARTIAL POLYMERS COMPRISING POLYMERIZING DIALLYL PHTHALATE IN A POLYMERIZATION ZONE UNTIL POLYMERIZATION IS FROM 20% TO 40% COMPLETE, CONTACTING THE PARTIAL POLYMER SO PRODUCED WITH FROM 2.5 TO 12 VOLUMES PER VOLUME OF PARTIAL POLYMER OF A DUAL SOLVENT, SAID DUAL SOLVENT CONTAINING FROM 65% TO 85% ACETONE AND THE BALEANCE WATER, WHEREBY TWO PHASES ARE FROMED, SEPARATING THE PHASES AND SUBJECTING THE UPPER PHASE TO STEAM STRIPPING WHEREBY AN OVERHEAD FRACTION IS PRODUCED COMPRISING DUAL SOLVENT AND A BOTTOMS IS PRODUCED CONTAINING WATER AND DIALLYL PHTHALATE MONOMER, SEPARATING THE WATER FROM THE MONOMER AND RETURNING THE MONOMER TO THE POLYMERIZATION VESSEL, CONTACTING THE LOWER PHASE FROM 2.5 TO 12 VOLUMES PER VOLUME OF PARTIAL POLYMER OF AN ACETONE-WATER DUAL SOLVENT CONTAINIG FROM 80% TO 87 1/2% ACETONE TO AGAIN FORM TWO PHASES,
References Cited (Backward Citations)
US2024666A
Cited
US2273891A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1955-10-07 | 1956-04-07 | 1956-10-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-10-07 | 1960-04-07 | 1960-10-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-10-07 | 1964-04-07 | 1964-10-07 | $7700.00 | Window Closed / Lapsed |