Patent US2660577A successfully refreshed from Google Patents.
US2660577A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Derivatization of starch witch lactones
Assignee: Corn Products Refining Co
•
Filing: 1950-05-27
•
Granted: 1953-11-24
•
Expires: 1970-05-27
Abstract
No abstract record available.
Inventors
- 👤 Ralph W Kerr
- 👤 William A Faucette
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 09:44
CPC Classifications
C; C08; C08B; C08B31/00; C08B31/02; C08B31/04
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
39 words
PROCESS FOR PREPARING STARCH DERIVATIVES, COMPRISING REACTING A SUBSTANCE FROM THE GROUP CONSISTING OF STARCH, CHEMICALLY MODIFIED STARCH, THIN BOILING STARCH, PRE-GELATINIZED STARCH, AND DEXTRIN WITH A LACTONE OF AN HYDROXY-CARBOXYLIC ACID, SAID LACTONE CORRESPONDING TO THE GENERAL FORMULA
Claim 2
Dependent Claim
39 words
PROCESS FOR PREPARING STARCH DERIVATIVES, COMPRISING REACTING A SUBSTANCE FROM THE GROUP CONSISTING OF STARCH, CHEMICALLY MODIFIED STARCH, THIN BOILING STARCH, PRE-GELATINIZED STARCH, AND DEXTRIN WITH A LACTONE OF AN HYDROXY-CARBOXYLIC ACID, SAID LACTONE CORRESPONDING TO THE GENERAL FORMULA
References Cited (Backward Citations)
US2148951A
Cited
US2412213A
Cited
US2316128A
Cited
US2461139A
Cited
US2474227A
Cited
US2526554A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1956-11-23 | 1957-05-25 | 1957-11-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-11-23 | 1961-05-25 | 1961-11-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-11-23 | 1965-05-25 | 1965-11-24 | $7700.00 | Window Closed / Lapsed |