US2496907A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Production of dispersions containing solid polymers of ethylene
Assignee: Imperial Chemical Industries Ltd
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Filing: 1947-12-22
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Granted: 1950-02-07
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Expires: 1967-12-22
Abstract
No abstract record available.
Inventors
- 👤 Dawson Fred
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 20:51
CPC Classifications
C; C08; C08J; C08J3/00; C08J3/02; C08J3/03; C08J3/07; C08J2323/00; C08J2323/02; C08J2323/04; C08J2323/06
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
90 words
THE PROCESS OF PREPARING CONCENTRATED DISPERSIONS OF SOLID POLYMERS OF ETHYLENE WHICH COMPRISES DISSOLVING THE SOLID POLYMER IN A WATERIMMISCIBLE VOLATILE ORGANIC SOLVENT, EMULSIFYING THE SOLUTION IN AN AQUEOUS MEDIUM IN THE PRESENCE OF AN EMULSIFYING AGENT AND A PROTEINACEOUS PROTECTIVE COLLOID, REMOVING THE VOLATILE SOLVENT, ACIDIFYING THE DILUTE DISPERSION TO A PH VALUE BELOW THE ISOELECTRIC POINT OF THE PROTEINACEOUS COLLOID, MECHANICALLY SEPARATING WATER FROM THE FLOCCULATED DISPERSION AND RECONSTITUTING THE DISPERSION BY ADJUSTING THE PH THEREOF TO A VALUE GREATER THAN THE ISOELECTRIC POINT OF THE PROTEINACEOUS COLLOID.
Claim 2
Dependent Claim
90 words
THE PROCESS OF PREPARING CONCENTRATED DISPERSIONS OF SOLID POLYMERS OF ETHYLENE WHICH COMPRISES DISSOLVING THE SOLID POLYMER IN A WATERIMMISCIBLE VOLATILE ORGANIC SOLVENT, EMULSIFYING THE SOLUTION IN AN AQUEOUS MEDIUM IN THE PRESENCE OF AN EMULSIFYING AGENT AND A PROTEINACEOUS PROTECTIVE COLLOID, REMOVING THE VOLATILE SOLVENT, ACIDIFYING THE DILUTE DISPERSION TO A PH VALUE BELOW THE ISOELECTRIC POINT OF THE PROTEINACEOUS COLLOID, MECHANICALLY SEPARATING WATER FROM THE FLOCCULATED DISPERSION AND RECONSTITUTING THE DISPERSION BY ADJUSTING THE PH THEREOF TO A VALUE GREATER THAN THE ISOELECTRIC POINT OF THE PROTEINACEOUS COLLOID.
References Cited (Backward Citations)
US2290794A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1953-02-06 | 1953-08-08 | 1954-02-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-02-06 | 1957-08-08 | 1958-02-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-02-06 | 1961-08-08 | 1962-02-07 | $7700.00 | Window Closed / Lapsed |