US2623864A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Polymerization of allylic ethers
Assignee: Individual
•
Filing: 1949-07-29
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Granted: 1952-12-30
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Expires: 1969-07-29
Abstract
No abstract record available.
Inventors
- 👤 Arthur N Wrigley
- 👤 Yanovsky Elias
- 👤 Jr Peter L Nichols
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 00:50
CPC Classifications
C; C08; C08F; C08F251/00; C07; C07H; C07H1/00
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
63 words
A PROCESS COMPRISING REACTING SOLVENT SOLUBLE ALLYL STARCH CONTAINING A PLURALITY OF ALLYL ETHER GROUPS AND IN BULK FORM WITH A SULFUR CHLORIDE BY FORMING A MIXTURE OF SAID REACTANTS WHEREIN THE MOLAR RATIO OF THE SULFUR CHLORIDE TO THE ETHER IS AT LEAST 1 TO 2, AND ALLOWING THE REACTION TO PROCEED TO SUBSTANTIAL COMPLETION AT A TEMPERATURE BELOW ABOUT 40* C.
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) | 1955-12-30 | 1956-06-30 | 1956-12-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-12-30 | 1960-06-30 | 1960-12-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-12-30 | 1964-06-30 | 1964-12-30 | $7700.00 | Window Closed / Lapsed |