Patent US3748979A successfully refreshed from Google Patents.
Patent US5222583A successfully refreshed from Google Patents.
Patent US2718221A successfully refreshed from Google Patents.
Patent US2848432A successfully refreshed from Google Patents.
US2848432A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Stabilization of linear polyester resins against degradation by hydrolysis by the addition of an acrylamide polymer
Assignee: Eastman Kodak Co
•
Filing: 1956-02-13
•
Granted: 1958-08-19
•
Expires: 1976-02-13
Abstract
No abstract record available.
Inventors
- 👤 Jr Roger M Schulken
- 👤 John W Tamblyn
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 17:40
CPC Classifications
C; C08; C08L; C08L67/00; C08L67/02
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
105 words
A THERMOPLASTIC COMPOSITION SUBSTANTIALLY COMPOSED OF A LINEAR POLYESTER DERIVED FROM THE CONDENSATION OF AN AROMATIC NUCLEARLY SUBSTITUTED DICARBOXY COMPOUND AND A GLYCOL CONTAINING FROM ABOUT 0.1 TO ABOUT 3% BY WEIGHT OF SAID LINEAR POOLYESTER OF A POLYMERIC BUFFERING AGENT SELECTED FROM THE GROUP CONSISTING OF SODIUM ACRYLATE POLYMERS, HOMOPOLYMERS OF N-LOWER ALKYL ACRYLAMIDES, AND COPOLYMERS CONTAINING AT LEAST 50% BY WEIGHT OF N-LOWER-ALKYL ACRYLAMIDES WITH MONOMERS SELECTED FROM THE GROUP CONSISTING OF ACRYLONITRILE, ACRYLIC ACID, MALEIC ANHYDRIDE AND 2-METHYL-5-VINYLPYRIDINE, WHICH POLYMERIC BUFFERING AGENT IS PRESENT IN SUFFICIENT AMOUNT TO SUBSTANTIALLY REDUCE LOSS IN INHERENT VISCOSITY OF THE COMPOSITION RESULTING FROM EXPOSURE TO HEAT.
Claim 2
Dependent Claim
105 words
A THERMOPLASTIC COMPOSITION SUBSTANTIALLY COMPOSED OF A LINEAR POLYESTER DERIVED FROM THE CONDENSATION OF AN AROMATIC NUCLEARLY SUBSTITUTED DICARBOXY COMPOUND AND A GLYCOL CONTAINING FROM ABOUT 0.1 TO ABOUT 3% BY WEIGHT OF SAID LINEAR POOLYESTER OF A POLYMERIC BUFFERING AGENT SELECTED FROM THE GROUP CONSISTING OF SODIUM ACRYLATE POLYMERS, HOMOPOLYMERS OF N-LOWER ALKYL ACRYLAMIDES, AND COPOLYMERS CONTAINING AT LEAST 50% BY WEIGHT OF N-LOWER-ALKYL ACRYLAMIDES WITH MONOMERS SELECTED FROM THE GROUP CONSISTING OF ACRYLONITRILE, ACRYLIC ACID, MALEIC ANHYDRIDE AND 2-METHYL-5-VINYLPYRIDINE, WHICH POLYMERIC BUFFERING AGENT IS PRESENT IN SUFFICIENT AMOUNT TO SUBSTANTIALLY REDUCE LOSS IN INHERENT VISCOSITY OF THE COMPOSITION RESULTING FROM EXPOSURE TO HEAT.
References Cited (Backward Citations)
US2598663A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-08-18 | 1962-02-17 | 1962-08-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-08-18 | 1966-02-17 | 1966-08-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-08-18 | 1970-02-17 | 1970-08-19 | $7700.00 | Window Closed / Lapsed |