Patent US3053805A successfully refreshed from Google Patents.
US3053805A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Linear polyesters from 1, 4-bis(2'-hydroxyethoxy)-2, 5-ditertiary butylbenzene
Assignee: Eastman Kodak Co
•
Filing: 1959-12-21
•
Granted: 1962-09-11
•
Expires: 1979-12-21
Abstract
No abstract record available.
Inventors
- 👤 John R Caldwell
- 👤 Gilkey Russell
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 06:19
CPC Classifications
C; C08; C08G; C08G63/00; C08G63/66; C08G63/668; C08G63/672; C08G63/68; C08G63/688; C08G63/6884; C08G63/6886
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
126 words
A HIGHLY POLYMERIC LINEAR POLYESTER OF (A) FROM 100 TO 75 MOLE PERCENT OF A HEXACARBOCYLIC DICARBOXYLIC ACID AND FROM 0 TO 25 MOLE PERCENT OF A DIFFERENT BIFUNCTIONAL DICARBOXYLIC ACID SELECTED FROM THE GROUP CONSISTING OF AN ALIPHATIC DICARBOXYLIC ACID HAVING FROM 2 TO 10 CARBON ATOMS, ISOPHTHALIC ACID, ORTHOPHTHALIC ACID, HEXAHYDROPHTHALIC ACID, AND SULFONYL DIPIVALIC ACID AND (B) FROM 0 TO 65 MOLE PERCENT OF A GLYCOL CONTAINING FROM 2 TO 20 CARBON ATOMS AND FROM 100 TO 35 MOLE PERCENT OF 1,4-BIS(2''-HYDROXYETHOXY)-2,5-DITERT, BUTYLBENZENE WHICH IS DIFFERENT FROM THE AFORESAID GLYCOL, WHICH POLYESTER MELTS AT BETWEEN ABOUT 2000*C. AND ABOUT 300*C., HAS AN INHERENT VISCOSITY OF AT LEAST 0.4 MEASURED IN 60% PHENOL AND 40% TETRACHLOROETHANE, AND IS CAPABLE OF BEING FORMED INTO FIBERS.
Claim 2
Dependent Claim
126 words
A HIGHLY POLYMERIC LINEAR POLYESTER OF (A) FROM 100 TO 75 MOLE PERCENT OF A HEXACARBOCYLIC DICARBOXYLIC ACID AND FROM 0 TO 25 MOLE PERCENT OF A DIFFERENT BIFUNCTIONAL DICARBOXYLIC ACID SELECTED FROM THE GROUP CONSISTING OF AN ALIPHATIC DICARBOXYLIC ACID HAVING FROM 2 TO 10 CARBON ATOMS, ISOPHTHALIC ACID, ORTHOPHTHALIC ACID, HEXAHYDROPHTHALIC ACID, AND SULFONYL DIPIVALIC ACID AND (B) FROM 0 TO 65 MOLE PERCENT OF A GLYCOL CONTAINING FROM 2 TO 20 CARBON ATOMS AND FROM 100 TO 35 MOLE PERCENT OF 1,4-BIS(2''-HYDROXYETHOXY)-2,5-DITERT, BUTYLBENZENE WHICH IS DIFFERENT FROM THE AFORESAID GLYCOL, WHICH POLYESTER MELTS AT BETWEEN ABOUT 2000*C. AND ABOUT 300*C., HAS AN INHERENT VISCOSITY OF AT LEAST 0.4 MEASURED IN 60% PHENOL AND 40% TETRACHLOROETHANE, AND IS CAPABLE OF BEING FORMED INTO FIBERS.
References Cited (Backward Citations)
US2762789A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1965-09-10 | 1966-03-12 | 1966-09-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-09-10 | 1970-03-12 | 1970-09-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-09-10 | 1974-03-12 | 1974-09-11 | $7700.00 | Window Closed / Lapsed |