US2861055A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Copolyesters of a glycol and an alkylene diamine dicarboxylate containing isophthalate modifier and their preparation
Assignee: Eastman Kodak Co
•
Filing: 1955-04-26
•
Granted: 1958-11-18
•
Expires: 1975-04-26
Abstract
No abstract record available.
Inventors
- 👤 Jack L R Williams
- 👤 Thomas M Laakso
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 02:34
CPC Classifications
C; C08; C08G; C08G69/00; C08G69/44
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
68 words
A HIGHLY POLYMERIC COPOLYESTER HAVING A MELTING POINT OF AT LEAST 200*C., AN INHERENT VISCOSITY OF AT LEAST 0.8 AND BEING OBTAINED BY HEATING AT A TEMPERATURE OF 100-300*C. A MIXTURE OF BIFUNCTIONAL REACTANTS CONSISTING FUNCTIONALLY OF ALKYLENE GLYCOL, N,N''-BIS(P-CARBOXYBENZOYL)ALKYLENE DIAMINE, AND ISOPHTHALIC ACID, EACH OF SAID ALKYLENE GROUPS CONTAINING 2-10 CARBON ATOMS, SAID COPOLYESTER RESULTING SOLELY FROM THE CONDENSATION POLYMERIZATION OF THE GLYCOL DIESTERS OF THE FORMULAS
Claim 2
Dependent Claim
68 words
A HIGHLY POLYMERIC COPOLYESTER HAVING A MELTING POINT OF AT LEAST 200*C., AN INHERENT VISCOSITY OF AT LEAST 0.8 AND BEING OBTAINED BY HEATING AT A TEMPERATURE OF 100-300*C. A MIXTURE OF BIFUNCTIONAL REACTANTS CONSISTING FUNCTIONALLY OF ALKYLENE GLYCOL, N,N''-BIS(P-CARBOXYBENZOYL)ALKYLENE DIAMINE, AND ISOPHTHALIC ACID, EACH OF SAID ALKYLENE GROUPS CONTAINING 2-10 CARBON ATOMS, SAID COPOLYESTER RESULTING SOLELY FROM THE CONDENSATION POLYMERIZATION OF THE GLYCOL DIESTERS OF THE FORMULAS
References Cited (Backward Citations)
US2071250A
Cited
US2692253A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-11-17 | 1962-05-19 | 1962-11-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-11-17 | 1966-05-19 | 1966-11-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-11-17 | 1970-05-19 | 1970-11-18 | $7700.00 | Window Closed / Lapsed |