US2733234A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Purification and recovery of zein
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
2026-11-09 05:53
CPC Classifications
A; A23; A23J; A23J1/00; A23J1/12
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
45 words
THE PROCESS OF PURIFYING ZEIN WHICH COMPRISES DISSOLVING THE ZEIN IN AQUEOUS CALCIUM HYDROXIDE AT A TEMPERATURE BELOW ABOUT 10* C., SEPARATING IMPURITIES AND RECOVERING ZEIN FROM SAID PURIFIED SOLUTION, THE AMOUNT OF CALCIUM HYDROXIDE BEING AT LEAST ABOUT ONE PERCENT BY WEIGHT OF ZEIN.
Claim 2
Dependent Claim
45 words
THE PROCESS OF PURIFYING ZEIN WHICH COMPRISES DISSOLVING THE ZEIN IN AQUEOUS CALCIUM HYDROXIDE AT A TEMPERATURE BELOW ABOUT 10* C., SEPARATING IMPURITIES AND RECOVERING ZEIN FROM SAID PURIFIED SOLUTION, THE AMOUNT OF CALCIUM HYDROXIDE BEING AT LEAST ABOUT ONE PERCENT BY WEIGHT OF ZEIN.
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) | 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 |