Patent US3331833A successfully refreshed from Google Patents.
US3331833A
Expired / Lapsed
US
⏱️ 0.0 years remaining
The graft polymerization of ethylenimine onto tertiary amino starch
Assignee: Ingredion Inc
•
Filing: 1964-03-23
•
Granted: 1967-07-18
•
Expires: 1984-03-23
Abstract
No abstract record available.
Inventors
- 👤 Jarowenko Wadym
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 07:31
CPC Classifications
C; C08; C08B; C08B31/00; C08B31/08; C08B31/12; C08B31/125
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
8 words
A CATIONIC STARCH DERIVATIVE HAVING THE STRUCTURAL FORMULA:
Claim 2
Dependent Claim
8 words
A CATIONIC STARCH DERIVATIVE HAVING THE STRUCTURAL FORMULA:
References Cited (Backward Citations)
US2656241A
Cited
US2813093A
Cited
US2972606A
Cited
US3253978A
Cited
US3236721A
Cited
US3219519A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1970-07-17 | 1971-01-16 | 1971-07-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-07-17 | 1975-01-16 | 1975-07-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-07-17 | 1979-01-16 | 1979-07-18 | $7700.00 | Window Closed / Lapsed |