Patent US3305508A successfully refreshed from Google Patents.
US3305508A
Expired / Lapsed
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Emulsification in presence of an aliphatic oxygen compound
Assignee: Shell USA Inc
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Filing: 1963-12-13
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Granted: 1967-02-21
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Expires: 1983-12-13
Abstract
No abstract record available.
Inventors
- 👤 Heij Gerardus E La
- 👤 Jacques A Waterman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 10:22
CPC Classifications
C; C08; C08J; C08J3/00; C08J3/02; C08J3/03; C08J3/07
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
142 words
IN THE PROCESS FOR PREPARING A LATEX OF A POLYMER OF THE GROUP CONSISTING OF POLYMERS OF POLYMERIZABLE VINYLIDENE COMPOUNDS WHEREIN ONE VOLUME OF A SOLUTION OF SAID POLYMER IN A WATER-IMMISCIBLE SOLVENT HAVING 4-10 CARBON ATOMS PER MOLECULE, IS EMULSIFIED WITH 0.55 VOLUMES OF AN AQUEOUS PHASE COMPRISING WATER AND AN EMULSIFYING AGENT, BY INTENSE AGITATION WHEREBY COLLOIDAL PARTICLES OF THE POLYMER SOLUTION SUSPENDED IN THE AQUEOUS PHASE ARE FORMED, REMOVING THE HYDROCARBON SOLVENT BY VAPORIZATION AND RECOVERING A LATEX THEREFROM, THE IMPROVEMENT COMPRISING ADDING TO THE MIXTURE OF POLYMER SOLUTION AND AQUEOUS PHASE PRIOR TO HYDROCARBON VAPORIZATION 0.5-30% VOLUME BASED ON THE AQUEOUS PHASE OF AN ALIPHATIC OXYGEN COMPOUND HAVING 4-10 CARBON ATOMS PER MOLECULE AND HAVING A SOLUBILITY IN WATER OF LESS THAN 20 GRAM PER 100 CC. WATER AT 30*C. OF THE GROUP CONSISTING OF ALCOHOLS AND KETONES.
Claim 2
Dependent Claim
142 words
IN THE PROCESS FOR PREPARING A LATEX OF A POLYMER OF THE GROUP CONSISTING OF POLYMERS OF POLYMERIZABLE VINYLIDENE COMPOUNDS WHEREIN ONE VOLUME OF A SOLUTION OF SAID POLYMER IN A WATER-IMMISCIBLE SOLVENT HAVING 4-10 CARBON ATOMS PER MOLECULE, IS EMULSIFIED WITH 0.55 VOLUMES OF AN AQUEOUS PHASE COMPRISING WATER AND AN EMULSIFYING AGENT, BY INTENSE AGITATION WHEREBY COLLOIDAL PARTICLES OF THE POLYMER SOLUTION SUSPENDED IN THE AQUEOUS PHASE ARE FORMED, REMOVING THE HYDROCARBON SOLVENT BY VAPORIZATION AND RECOVERING A LATEX THEREFROM, THE IMPROVEMENT COMPRISING ADDING TO THE MIXTURE OF POLYMER SOLUTION AND AQUEOUS PHASE PRIOR TO HYDROCARBON VAPORIZATION 0.5-30% VOLUME BASED ON THE AQUEOUS PHASE OF AN ALIPHATIC OXYGEN COMPOUND HAVING 4-10 CARBON ATOMS PER MOLECULE AND HAVING A SOLUBILITY IN WATER OF LESS THAN 20 GRAM PER 100 CC. WATER AT 30*C. OF THE GROUP CONSISTING OF ALCOHOLS AND KETONES.
References Cited (Backward Citations)
US2615010A
Cited
US2953556A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1970-02-20 | 1970-08-22 | 1971-02-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-02-20 | 1974-08-22 | 1975-02-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-02-20 | 1978-08-22 | 1979-02-21 | $7700.00 | Window Closed / Lapsed |