US2663701A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for polymerizing certain unsaturated compounds in an aqueous system
Assignee: Shell Development Co
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Filing: 1951-07-23
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Granted: 1953-12-22
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Expires: 1971-07-23
Abstract
No abstract record available.
Inventors
- 👤 Geza S Ronay
- 👤 Jerome R Vinograd
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 06:03
CPC Classifications
C; C08; C08F; C08F2/00; C08F2/12; C08F2/16; C08F2/22
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
147 words
IN A PROCESS FOR POLYMERIZING AN ETHYLENICALLY UNSATURATED ORGANIC COMPOUND HAVING A MOLECUALR WEIGHT BELOW 225 AND A SOLUBILITY IN WATER VARYING FROM SOME SOLUBILITY TO NOT MORE THAN 18 PARTS FROM 100 PARTS OF WATER AT ROOM TEMPERATURE WHEREIN THE SAID COMPOUND IS DISSOLVED IN AN AQUEOUS MEDIUM CONTAINING WATER AND A WATER-SOLUBLE POLYMERIZATION CATALYST IN AN AMOUNT WHICH IS INSUFFICIENT TO FORM A SEPARATE ORGANIC LAYER AND THE MIXTURE IS MAINTAINED AT A POLYMERIZING TEMPERATURE, THE IMPROVEMENT WHICH COMPRISES AFTER AT LEAST ONE-FOURTH OF THE MONOMER INITIALLY DISSOLVED IN THE AQUEOUS MEDIUM HAS BEEN POLYMERIZED AND IN THE PRESENCE OF THE FORMED POLYMER ADDING MONOMER OVER A PERIOD OF TIME TO THE REACTION MIXTURE AT A RATE WHICH IS AT LEAST TWICE THE INITIAL RATE OF POLYMERIZATION, SAID ADDITION NEVER BEING SUFFICIENT TO CAUSE THE FORMATION OF A SEPARATE ORGANIC LAYER IN THE REACTION MIXTURE.
Claim 2
Dependent Claim
147 words
IN A PROCESS FOR POLYMERIZING AN ETHYLENICALLY UNSATURATED ORGANIC COMPOUND HAVING A MOLECUALR WEIGHT BELOW 225 AND A SOLUBILITY IN WATER VARYING FROM SOME SOLUBILITY TO NOT MORE THAN 18 PARTS FROM 100 PARTS OF WATER AT ROOM TEMPERATURE WHEREIN THE SAID COMPOUND IS DISSOLVED IN AN AQUEOUS MEDIUM CONTAINING WATER AND A WATER-SOLUBLE POLYMERIZATION CATALYST IN AN AMOUNT WHICH IS INSUFFICIENT TO FORM A SEPARATE ORGANIC LAYER AND THE MIXTURE IS MAINTAINED AT A POLYMERIZING TEMPERATURE, THE IMPROVEMENT WHICH COMPRISES AFTER AT LEAST ONE-FOURTH OF THE MONOMER INITIALLY DISSOLVED IN THE AQUEOUS MEDIUM HAS BEEN POLYMERIZED AND IN THE PRESENCE OF THE FORMED POLYMER ADDING MONOMER OVER A PERIOD OF TIME TO THE REACTION MIXTURE AT A RATE WHICH IS AT LEAST TWICE THE INITIAL RATE OF POLYMERIZATION, SAID ADDITION NEVER BEING SUFFICIENT TO CAUSE THE FORMATION OF A SEPARATE ORGANIC LAYER IN THE REACTION MIXTURE.
References Cited (Backward Citations)
US2436926A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1956-12-21 | 1957-06-22 | 1957-12-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-12-21 | 1961-06-22 | 1961-12-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-12-21 | 1965-06-22 | 1965-12-22 | $7700.00 | Window Closed / Lapsed |