Patent US2686779A successfully refreshed from Google Patents.
US2686779A
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Process for producing alkali metal sulfates of cellulose, inulin, dextrin, and starch
Assignee: Phillips Petroleum Co
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Filing: 1949-07-18
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Granted: 1954-08-17
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Expires: 1969-07-18
Abstract
No abstract record available.
Inventors
- 👤 Rufus V Jones
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 16:23
CPC Classifications
C; C08; C08B; C08B5/00; C08B5/14; C08B31/00; C08B31/02; C08B31/06; C08B31/063
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
63 words
THE PROCESS WHICH COMPRISES REACTING AN ALKALI METAL CHLOROSULFONATE UNDER ANYHYDROUS CONDITIONS WITH A COMPOUND SELECTED FROM THE GROUP CONSISTING OF CELLULOSE, STARCH, DEXTRIN, INULIN AND THE ALKALI METAL DERIVATIVES OF SAID COMPOUNDS IN THE PRESENCE OF A TERTIARY AMINE WHEREBY HYDROGEN CHLORIDE PRODUCED BY THE REACTION IS CONTINUOUSLY ABSORBED BY THE TERTIALRY AMINE AND DEGRADATION OF THE SELECTED COMPOUND IS SUBSTANTALLY PREVENTED.
Claim 2
Dependent Claim
63 words
THE PROCESS WHICH COMPRISES REACTING AN ALKALI METAL CHLOROSULFONATE UNDER ANYHYDROUS CONDITIONS WITH A COMPOUND SELECTED FROM THE GROUP CONSISTING OF CELLULOSE, STARCH, DEXTRIN, INULIN AND THE ALKALI METAL DERIVATIVES OF SAID COMPOUNDS IN THE PRESENCE OF A TERTIARY AMINE WHEREBY HYDROGEN CHLORIDE PRODUCED BY THE REACTION IS CONTINUOUSLY ABSORBED BY THE TERTIALRY AMINE AND DEGRADATION OF THE SELECTED COMPOUND IS SUBSTANTALLY PREVENTED.
References Cited (Backward Citations)
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Cited
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1957-08-16 | 1958-02-15 | 1958-08-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-08-16 | 1962-02-15 | 1962-08-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-08-16 | 1966-02-15 | 1966-08-17 | $7700.00 | Window Closed / Lapsed |