US2862906A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Suspension process for the polymerization of vinylidene aromatic hydrocarbons
Assignee: Monsanto Chemical Co
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Filing: 1957-04-01
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Granted: 1958-12-02
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Expires: 1977-04-01
Abstract
No abstract record available.
Inventors
- 👤 Stein Alvin
- 👤 Robert L Walter
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 15:43
CPC Classifications
C; C08; C08F; C08F2/00; C08F2/12; C08F2/16; C08F265/00; C08F265/02
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
116 words
IN A PROCESS FOR PREPARING POLYMERIZATION PRODUCTS IN GRANULAR FORM, THE STEP WHICH COMPRISES POLYMERIZING AN AQUEOUS DISPERSION OF A POLYMERIZABLE MATERIAL CONTAINING A VINYLIDENE MONOMER OF THE GROUP CONSISTING OF VINYLIDENE AROMATIC HYDROCARBON MONOMER, A RING-HALOGENATED VINYLIDENE AROMATIC HYDROCARBON MONOMER AND MIXTURES THEREOF IN THE PRESENCE OF, AS A DISPERSING AGENT, A MIXTURE OF (1) A WATER-SOLUBLE INTERPOLYMER CONSISTING OF 93.5-98.5 MOL PERCENT OF AN ACIDIC MONOMER OF THE GROUP CONSISTING OF ACRYLIC ACID, METHACRYLIC ACID, AND MIXTURES THEREOF, AND, CORRESPONDINGLY, 6.5-1.5 MOL PERCENT OF A MONOMER OF THE GROUP CONSISTING OF 2-ETHYLHEXYL ACRYLATE, 2-ETHYLHEXYL METHACRYLATE AND MIXTURES THEREOF, AND (2) A MATERIAL FROM THE GROUP CONSISTING OF BIS(SULFOARYL) ALKANES AND WATER SOLUBLE SALTS THEREOF.
Claim 2
Dependent Claim
116 words
IN A PROCESS FOR PREPARING POLYMERIZATION PRODUCTS IN GRANULAR FORM, THE STEP WHICH COMPRISES POLYMERIZING AN AQUEOUS DISPERSION OF A POLYMERIZABLE MATERIAL CONTAINING A VINYLIDENE MONOMER OF THE GROUP CONSISTING OF VINYLIDENE AROMATIC HYDROCARBON MONOMER, A RING-HALOGENATED VINYLIDENE AROMATIC HYDROCARBON MONOMER AND MIXTURES THEREOF IN THE PRESENCE OF, AS A DISPERSING AGENT, A MIXTURE OF (1) A WATER-SOLUBLE INTERPOLYMER CONSISTING OF 93.5-98.5 MOL PERCENT OF AN ACIDIC MONOMER OF THE GROUP CONSISTING OF ACRYLIC ACID, METHACRYLIC ACID, AND MIXTURES THEREOF, AND, CORRESPONDINGLY, 6.5-1.5 MOL PERCENT OF A MONOMER OF THE GROUP CONSISTING OF 2-ETHYLHEXYL ACRYLATE, 2-ETHYLHEXYL METHACRYLATE AND MIXTURES THEREOF, AND (2) A MATERIAL FROM THE GROUP CONSISTING OF BIS(SULFOARYL) ALKANES AND WATER SOLUBLE SALTS THEREOF.
References Cited (Backward Citations)
US2535189A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-12-01 | 1962-06-02 | 1962-12-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-12-01 | 1966-06-02 | 1966-12-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-12-01 | 1970-06-02 | 1970-12-02 | $7700.00 | Window Closed / Lapsed |