US2996475A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Homogeneous mixtures comprising polyesters and polymeric acrylamides and process forpreparing same
Assignee: Eastman Kodak Co
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Filing: 1957-05-27
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Granted: 1961-08-15
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Expires: 1977-05-27
Abstract
No abstract record available.
Inventors
- 👤 Frederick B Joyner
- 👤 Jr Harry W Coover
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 13:56
CPC Classifications
C; C08; C08G; C08G63/00; C08G63/68; C08G63/688; C08G63/6884; C08G63/6886; C08G63/02; C08G63/12; C08G63/16; C08G63/18; C08G63/181; C08G63/183; C08G63/199; C08L; C08L67/00; C08L67/02
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
183 words
A HOMOGENEOUS MIXTURE OF FROM 69 TO 96% BY WEIGHT OF A LINEAR POLYESTER SELECTED FROM THE GROUP CONSISTING OF (1) POLYETHYLENE TEREPHTHALATE, (2) A LINEAR POLYESTER OF EQUIMOLAR PROPORTIONS OF 4,4''-SULFONYLDIBENZOIC ACID AND A SATURATED, STRAIGHT-CHAIN ALKANEDIOL OF 5 TO 12 CARBON ATOMS, (3) A LINEAR POLYESTER AS DEFINED BY (2) ABOVE WHEREIN THE SAID ACID IS PARTIALLY REPLACED BY A SATURATED, STRAIGHT-CHAIN DIBASIC FATTY ACID OF FROM 2 TO 20 CARBON ATOMS, (4) A LINEAR POLYESTER AS DEFINED BY (2) ABOVE WHEREIN THE SAID ACID IS PARTIALLY REPLACED BY TEREPHTHALIC ACID, (5) A LINEAR POLYESTER OF EQUIMOLAR PROPORTIONS OF TEREPHTHALIC ACID AND 1,4-CYCLOHEXANEDIMETHANOL, (6) A LINEAR POLYESTER AS DEFINED BY (5) ABOVE WHEREIN THE SAID ACID IS PARTIALLY REPLACED BY A SATURATED, STRAIGHT-CHAIN DIBASIC FATTY ACID OF 2 TO 20 CARBON ATOMS, AND (7) A LINEAR POLYESTER AS DEFINED BY (5) ABOVE WHEREIN THE SAID ACID IS PARTIALLY REPLACED BY ISOPHTHALIC ACID, AND FROM 31 TO 4% BY WEIGHT OF A POLYMERIC ACRYLAMIDE SELECTED FROM THE GROUP CONSISTING OF (A) A HOMOPOLYMER OF A COMPOUND REPRESENTED BY THE FOLLOWING GENERAL FORMULA:
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) | 1964-08-14 | 1965-02-13 | 1965-08-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-08-14 | 1969-02-13 | 1969-08-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-08-14 | 1973-02-13 | 1973-08-15 | $7700.00 | Window Closed / Lapsed |