Patent US2856385A successfully refreshed from Google Patents.
US2856385A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Polyester-amides of n,n'-bis-(p-carboxybenzoyl) alkylenediamines, glycols and diamines
Assignee: Eastman Kodak Co
•
Filing: 1956-05-10
•
Granted: 1958-10-14
•
Expires: 1976-05-10
Abstract
No abstract record available.
Inventors
- 👤 Berghe John Van Den
- 👤 Jack L R Williams
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 13:31
CPC Classifications
C; C08; C08G; C08G69/00; C08G69/44
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
67 words
A HIGHLY POLYMERIC LINEAR POLYESTER-AMIDE OF N,N''BIS(P-CARBOXYBENZOYL)HEXAMETHYLENE DIAMINE, A POLYMETHYLENE GLYCOL CONTAINING 2-10 CARBON ATOMS, AND AN ALKYLENE DIAMINE CONTAINING 2-6 CARBON ATOMS, SAID GLYCOL AND DIAMINE COMPONENTS BEING IN A MOLAR RATIO OF 2-60 MOLE PERCENT OF SAID 2-6 CARBON ATOM UNSUBSTITUTED ALKYLENE DIAMINE TO 98-40 MOLE PERCENT OF SAID GLYCOL BASED ON SAID N,N''-BIS(P-CARBOXYBENZOYL)HEXAMETHYLENE DIAMINE, SAID POLYESTER-AMIDE HAVING AN INHERENT VISCOSITY OF AT LEAST 0.4.
Claim 2
Dependent Claim
67 words
A HIGHLY POLYMERIC LINEAR POLYESTER-AMIDE OF N,N''BIS(P-CARBOXYBENZOYL)HEXAMETHYLENE DIAMINE, A POLYMETHYLENE GLYCOL CONTAINING 2-10 CARBON ATOMS, AND AN ALKYLENE DIAMINE CONTAINING 2-6 CARBON ATOMS, SAID GLYCOL AND DIAMINE COMPONENTS BEING IN A MOLAR RATIO OF 2-60 MOLE PERCENT OF SAID 2-6 CARBON ATOM UNSUBSTITUTED ALKYLENE DIAMINE TO 98-40 MOLE PERCENT OF SAID GLYCOL BASED ON SAID N,N''-BIS(P-CARBOXYBENZOYL)HEXAMETHYLENE DIAMINE, SAID POLYESTER-AMIDE HAVING AN INHERENT VISCOSITY OF AT LEAST 0.4.
References Cited (Backward Citations)
US2071250A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-10-13 | 1962-04-14 | 1962-10-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-10-13 | 1966-04-14 | 1966-10-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-10-13 | 1970-04-14 | 1970-10-14 | $7700.00 | Window Closed / Lapsed |