US2733238A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Reaction of starch and alkylene oxides
Assignee: —
•
Filing: —
•
Granted: 1956-01-31
•
Expires: 1973-01-31
Abstract
No abstract record available.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 08:00
CPC Classifications
D; D06; D06M; D06M15/00; D06M15/01; D06M15/03; D06M15/11; C; C08; C08B; C08B31/00; C08B31/08; C08B31/12
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
26 words
THE PROCESS FOR THE PRODUCTION OF STARCH DERIVATIVES COMPRISING ETHERIFYING SUBSTANTIALLY DRY STARCH WITH AN ETHRIFYING AGENT FROM THE GROUP CONSISTING OF COMPOUNTS HAVING THE FORMULA:
Claim 2
Dependent Claim
26 words
THE PROCESS FOR THE PRODUCTION OF STARCH DERIVATIVES COMPRISING ETHERIFYING SUBSTANTIALLY DRY STARCH WITH AN ETHRIFYING AGENT FROM THE GROUP CONSISTING OF COMPOUNTS HAVING THE FORMULA:
References Cited (Backward Citations)
US2372337A
Cited
US2316129A
Cited
US2516632A
Cited
US2516633A
Cited
US2500179A
Cited
US2524400A
Cited
US2554143A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1959-01-30 | 1959-08-01 | 1960-01-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-01-30 | 1963-08-01 | 1964-01-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-01-30 | 1967-08-01 | 1968-01-31 | $7700.00 | Window Closed / Lapsed |