Patent US3254138A successfully refreshed from Google Patents.
US3254138A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Graft copolymers of acrylonitrile onto a homopolymeric polyamide having n-alkyl substitution
Assignee: Eastman Kodak Co
•
Filing: 1963-09-12
•
Granted: 1966-05-31
•
Expires: 1983-09-12
Abstract
No abstract record available.
Inventors
- 👤 Jr Hugh J Hagemeyer
- 👤 Alden E Blood
- 👤 James D Heller
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 12:55
CPC Classifications
C; C08; C08F; C08F265/00; C08F265/10; C08F267/00; C08F267/10
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
34 words
A RESINOUS GRAFT COPOLYMER OF (1) FROM 60-90% BY WEIGHT OF ACRYLONITRILE MONOMER AND (2) FROM 40-10% BY WEIGHT OF THE HOMOPOLYMER OF A COMPOUND SELECTED FROM THOSE REPRESENTED BY THE FOLLOWING GENERAL FORMULAS:
Claim 2
Dependent Claim
34 words
A RESINOUS GRAFT COPOLYMER OF (1) FROM 60-90% BY WEIGHT OF ACRYLONITRILE MONOMER AND (2) FROM 40-10% BY WEIGHT OF THE HOMOPOLYMER OF A COMPOUND SELECTED FROM THOSE REPRESENTED BY THE FOLLOWING GENERAL FORMULAS:
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) | 1969-05-30 | 1969-11-29 | 1970-05-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-05-30 | 1973-11-29 | 1974-05-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-05-30 | 1977-11-29 | 1978-05-31 | $7700.00 | Window Closed / Lapsed |