US2823200A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Preparation of vinyl halide polymerization products in granular form
Assignee: Monsanto Chemicals Ltd
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Filing: 1955-08-25
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Granted: 1958-02-11
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Expires: 1975-08-25
Abstract
No abstract record available.
Inventors
- 👤 Jr Raymond I Longley
- 👤 Jr Richard H Martin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 03:38
CPC Classifications
C; C08; C08F; C08F267/00; C08F267/02
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
107 words
A PROCESS FOR PREPARING POLYMERIZATION PRODUCTS IN GRANNULAR FORM, THE STEP WHICH COMPRISES POLYMERIZING AN AQUEOUS DISPERSION OF A POLYMERIZABLE MATERIAL CONTAINING A VINYL HALIDE FROM THE GROUP CONSISTING OF VINYL FLUORIDE, VINYL CHLORIDE AND VINYL BROMIDE IN THE PRESENCE OF, AS A DISPERSING AGENT, AN INTERPOLYMER OF MONOMERIC MIXTURE CONSISTING OF ESSENTIALLY EQUIMOLAR PORTIONS OF ETHYLENE AND A COMPOUND SELECTED FROM THE GROUP CONSISTING OF MALEIC ACID AND MALEIC ANHYDRIDE DISSOLVED IN THE AQUEOUS PHASE, SAID INTERPOLYMER BEING FREE FROM SALT GROUPS AND, WHEN IN THE ANHYDRIDE FORM, HAVING A SPECIFIC VISCOSITY OF AT LEAST 1.1 AS DETERMINED IN A 1% SOLUTION IN DIMETHYLFORMAMIDE AT 25*C.
Claim 2
Dependent Claim
107 words
A PROCESS FOR PREPARING POLYMERIZATION PRODUCTS IN GRANNULAR FORM, THE STEP WHICH COMPRISES POLYMERIZING AN AQUEOUS DISPERSION OF A POLYMERIZABLE MATERIAL CONTAINING A VINYL HALIDE FROM THE GROUP CONSISTING OF VINYL FLUORIDE, VINYL CHLORIDE AND VINYL BROMIDE IN THE PRESENCE OF, AS A DISPERSING AGENT, AN INTERPOLYMER OF MONOMERIC MIXTURE CONSISTING OF ESSENTIALLY EQUIMOLAR PORTIONS OF ETHYLENE AND A COMPOUND SELECTED FROM THE GROUP CONSISTING OF MALEIC ACID AND MALEIC ANHYDRIDE DISSOLVED IN THE AQUEOUS PHASE, SAID INTERPOLYMER BEING FREE FROM SALT GROUPS AND, WHEN IN THE ANHYDRIDE FORM, HAVING A SPECIFIC VISCOSITY OF AT LEAST 1.1 AS DETERMINED IN A 1% SOLUTION IN DIMETHYLFORMAMIDE AT 25*C.
References Cited (Backward Citations)
US2476474A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-02-10 | 1961-08-12 | 1962-02-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-02-10 | 1965-08-12 | 1966-02-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-02-10 | 1969-08-12 | 1970-02-11 | $7700.00 | Window Closed / Lapsed |