US2772256A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for polymerizing vinyl chloride
Assignee: Monsanto Chemicals Ltd
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Filing: 1953-08-13
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Granted: 1956-11-27
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Expires: 1973-08-13
Abstract
No abstract record available.
Inventors
- 👤 Michael A Manganelli
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 10:06
CPC Classifications
C; C08; C08F; C08F14/00; C08F14/02; C08F14/04; C08F14/06; C08F263/00; C08F263/02; C08F263/04
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
139 words
A PROCESS FOR PREPARING A POROUS GRANULAR POLYMER WHICH COMPRISES POLYMERIZING 100 PARTS OF VINYL CHLORIDE IN SUSPENSION IN FROM ABOUT 100 TO 200 PARTS OF WATER CONTAINING FROM ABOUT 0.01 TO 1 PART OF A WATER-INSOLUBLE, OIL SOLUBLE POLYMERIZATION CATALYST AND A SUSPENDING MEDIUM CONSISTING OF FROM ABOUT 0.1 TO 1 PART OF A HETEROPOLYMER OF VINYL ACETATE AND A COMPOUND TAKEN FROM THE GROUP CONSISTING OF MALEIC ACID AND MALEIC ANHYDRIDE AND FROM ABOUT 0.1 TO ABOUT 0.3 PART OF AN ETHYLENE OXIDE CONDENSATE OF A SATURATED FATTY ACID MONOESTER OF A COMPOUND TAKEN FROM THE GROUP CONSISTING OF ETHYLENE GLYCOL AND GLYCEROL, THE FATTY ACID RESIDUE OF SAID MONO-ESTER CONTAINING FROM 12 TO 24 CARBON ATOMS, SAID CONDENSATE HAVING A MOLAR RATIO OF ETHYLENE OXIDE TO FATTY ACID MONO-ESTER OF FROM ABOUT 5:1 TO ABOUT 15:1.
Claim 2
Dependent Claim
139 words
A PROCESS FOR PREPARING A POROUS GRANULAR POLYMER WHICH COMPRISES POLYMERIZING 100 PARTS OF VINYL CHLORIDE IN SUSPENSION IN FROM ABOUT 100 TO 200 PARTS OF WATER CONTAINING FROM ABOUT 0.01 TO 1 PART OF A WATER-INSOLUBLE, OIL SOLUBLE POLYMERIZATION CATALYST AND A SUSPENDING MEDIUM CONSISTING OF FROM ABOUT 0.1 TO 1 PART OF A HETEROPOLYMER OF VINYL ACETATE AND A COMPOUND TAKEN FROM THE GROUP CONSISTING OF MALEIC ACID AND MALEIC ANHYDRIDE AND FROM ABOUT 0.1 TO ABOUT 0.3 PART OF AN ETHYLENE OXIDE CONDENSATE OF A SATURATED FATTY ACID MONOESTER OF A COMPOUND TAKEN FROM THE GROUP CONSISTING OF ETHYLENE GLYCOL AND GLYCEROL, THE FATTY ACID RESIDUE OF SAID MONO-ESTER CONTAINING FROM 12 TO 24 CARBON ATOMS, SAID CONDENSATE HAVING A MOLAR RATIO OF ETHYLENE OXIDE TO FATTY ACID MONO-ESTER OF FROM ABOUT 5:1 TO ABOUT 15:1.
References Cited (Backward Citations)
US2528469A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1959-11-27 | 1960-05-28 | 1960-11-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-11-27 | 1964-05-28 | 1964-11-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-11-27 | 1968-05-28 | 1968-11-27 | $7700.00 | Window Closed / Lapsed |