US2635099A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for producing organic solvent soluble allyl starch
Assignee: Individual
•
Filing: 1947-07-11
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Granted: 1953-04-14
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Expires: 1967-07-11
Abstract
No abstract record available.
Inventors
- 👤 Eugene A Talley
- 👤 Yanovsky Elias
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 17:23
CPC Classifications
C; C08; C08B; C08B31/00; C08B31/08
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
102 words
A PROCESS OF PREPARING ORGANIC SOLVENT SOLUBLE ALLYL STARCH COMPRISING ALLYATING STARCH BY HEATING IT WITH ALLYL CHLORIDE IN THE PRESENCE OF CONCENTRATED AQUEOUS ALKALI METAL HYDROXIDE SOLUTION AND IN THE ABSENCE OF AN ORGANIC SOLVENT THEREBY FORMING ORGANIC SOLVENT INSOLUBLE ALLYL STARCH, AND AFTER SUBSTANTIAL COMPLETION OF THE ALLYLATION ADDING ACIDIFIED INERT ORGANIC SOLVENT TO THE RESULTING REACTION MIXTURE AND CONTAINUING THE HEATING IN SAID SOLVENT TO RENDER THE ALLYL STARCH SOLUBLE THEREIN, THE SOLVENT BEING TAKEN FROM THE GROUP CONSISTING OF METHYL, ETHYL KETONE, PROPYL ALCOHOL, ACETONE, METHYL ETHYL KETONE, BENZENE, TOLUENE, XYLENE, CHLOROBENZENE, ETHYL ACETATE, BUTYL ACETATE, AND DIOXANE.
Claim 2
Dependent Claim
102 words
A PROCESS OF PREPARING ORGANIC SOLVENT SOLUBLE ALLYL STARCH COMPRISING ALLYATING STARCH BY HEATING IT WITH ALLYL CHLORIDE IN THE PRESENCE OF CONCENTRATED AQUEOUS ALKALI METAL HYDROXIDE SOLUTION AND IN THE ABSENCE OF AN ORGANIC SOLVENT THEREBY FORMING ORGANIC SOLVENT INSOLUBLE ALLYL STARCH, AND AFTER SUBSTANTIAL COMPLETION OF THE ALLYLATION ADDING ACIDIFIED INERT ORGANIC SOLVENT TO THE RESULTING REACTION MIXTURE AND CONTAINUING THE HEATING IN SAID SOLVENT TO RENDER THE ALLYL STARCH SOLUBLE THEREIN, THE SOLVENT BEING TAKEN FROM THE GROUP CONSISTING OF METHYL, ETHYL KETONE, PROPYL ALCOHOL, ACETONE, METHYL ETHYL KETONE, BENZENE, TOLUENE, XYLENE, CHLOROBENZENE, ETHYL ACETATE, BUTYL ACETATE, AND DIOXANE.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1956-04-13 | 1956-10-13 | 1957-04-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-04-13 | 1960-10-13 | 1961-04-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-04-13 | 1964-10-13 | 1965-04-14 | $7700.00 | Window Closed / Lapsed |