Patent US2533204A successfully refreshed from Google Patents.
US2533204A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Ternary interpolymers comprising acrylonitrile and n-substituted maleamic acids
Assignee: Eastman Kodak Co
•
Filing: 1949-11-23
•
Granted: 1950-12-12
•
Expires: 1969-11-23
Abstract
No abstract record available.
Inventors
- 👤 John R Caldwell
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 17:21
CPC Classifications
C; C08; C08F; C08F22/00; C08F22/36; C08F220/00; C08F220/02; C08F220/42; C08F220/44
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
39 words
A TERNARY INTERPOLYMER CONTAINING IN THE POLYMER MOLECULE FROM 45 TO 85 PER CENT BY WEIGHT OF ACRYLONITRILE, FROM 5 TO 30 PER CENT BY WEIGHT OF A MALEAMIC ACID SELECTED FROM THOSE REPRESENTED BY THE FOLLOWING GENERAL FORMULA:
Claim 2
Dependent Claim
39 words
A TERNARY INTERPOLYMER CONTAINING IN THE POLYMER MOLECULE FROM 45 TO 85 PER CENT BY WEIGHT OF ACRYLONITRILE, FROM 5 TO 30 PER CENT BY WEIGHT OF A MALEAMIC ACID SELECTED FROM THOSE REPRESENTED BY THE FOLLOWING GENERAL FORMULA:
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1953-12-11 | 1954-06-12 | 1954-12-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-12-11 | 1958-06-12 | 1958-12-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-12-11 | 1962-06-12 | 1962-12-12 | $7700.00 | Window Closed / Lapsed |