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Patent US2961420A successfully refreshed from Google Patents.
US2961420A
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Novel styrene latices
Assignee: Monsanto Chemicals Ltd
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Filing: 1957-12-09
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Granted: 1960-11-22
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Expires: 1977-12-09
Abstract
No abstract record available.
Inventors
- 👤 Jr Robert J Frey
- 👤 Murray H Roth
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 16:39
CPC Classifications
C; C08; C08F; C08F2/00; C08F2/12; C08F2/16; C08F289/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
86 words
IN A PROCESS FOR THE AQUEOUS EMULSION-POLYMERIZATION OF MONOMERIC POLYMIRIZABLE MATERIALS COMPRISING AT LEAST 50% BY WEIGHT OF A STYRENE COMPOUND SELECTED FROM THE GROUP CONSISTING OF STYRENE, ALPHA-METHYL STYRENE, DIVINYL BENZENE AND THE CORRESPONDING HALO, NITROL, METHYL, AND ETHYL NUCLEAR SUBSTITUTED DERIVATIVES THEREOF, THE STEP OF EFFECTING SAID POLYMERIZATION OF A PH OF FROM 8.0 TO 9.2 IN THE PRESENCE OF FROM 0.2 TO 7% OF A NON-IONIC SURFACTANT AND FROM 1 TO 10% OF SHELLAC, BOTH EXPRESSED AS PERCENT BY WEIGHT OF THE LATEX.
Claim 2
Dependent Claim
86 words
IN A PROCESS FOR THE AQUEOUS EMULSION-POLYMERIZATION OF MONOMERIC POLYMIRIZABLE MATERIALS COMPRISING AT LEAST 50% BY WEIGHT OF A STYRENE COMPOUND SELECTED FROM THE GROUP CONSISTING OF STYRENE, ALPHA-METHYL STYRENE, DIVINYL BENZENE AND THE CORRESPONDING HALO, NITROL, METHYL, AND ETHYL NUCLEAR SUBSTITUTED DERIVATIVES THEREOF, THE STEP OF EFFECTING SAID POLYMERIZATION OF A PH OF FROM 8.0 TO 9.2 IN THE PRESENCE OF FROM 0.2 TO 7% OF A NON-IONIC SURFACTANT AND FROM 1 TO 10% OF SHELLAC, BOTH EXPRESSED AS PERCENT BY WEIGHT OF THE LATEX.
References Cited (Backward Citations)
US2733224A
Cited
US2155591A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-11-22 | 1964-05-23 | 1964-11-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-11-22 | 1968-05-23 | 1968-11-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-11-22 | 1972-05-23 | 1972-11-22 | $7700.00 | Window Closed / Lapsed |