Patent US2851443A successfully refreshed from Google Patents.
US2851443A
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Quenchable copolyesters of a glycol, terephthalic acid and an alkylene diamine dicarboxylate and their preparation
Assignee: Eastman Kodak Co
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Filing: 1955-04-26
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Granted: 1958-09-09
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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
2026-11-02 18:53
CPC Classifications
C; C08; C08G; C08G69/00; C08G69/44; Y; Y10; Y10S; Y10S8/00; Y10S8/04
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
91 words
A HIGHLY PLYMERIC COPOLYESTER HAVING AN INHERENT VISCOSITY OF AT LEAST 0.7 AND A MELTING POINT OF AT LEAST 200*C. AND RESULTING FROM HEATING AT 100-300*C. A MIXTURE OF MONOMERIC BIFUNCTIONAL REACTANT CONSISTING FUNCTIONALLY OF AT LEAST TWO MOLAR PROPORTIONS OF ALKYLENE GLYCOL, WITH ONE MOLAR PROPORTION OF A MIXTURE OF DICARBOXYLATE MONOMERS CONSISTING OF N,N''-BIS(P-CARBOXYBENZOYL)ALKYLENE DIAMINE, AND TEREPHTHALIC ACID, EACH OF SAID SLKYLENE GROUPS CONTAINING 2-10 CARBON ATOMS, SAID TEREPHTHALIC ACID IN COMBINED FORM AMOUNTING TO 5-90 MOLE PERCENT OF TOTAL AMOUNT OF SAID TEREPHTHALIC ACID AND SAID N,N''-BIS(P-CARBOXYBENZOYL)ALKYLENE DIAMINE.
Claim 2
Dependent Claim
91 words
A HIGHLY PLYMERIC COPOLYESTER HAVING AN INHERENT VISCOSITY OF AT LEAST 0.7 AND A MELTING POINT OF AT LEAST 200*C. AND RESULTING FROM HEATING AT 100-300*C. A MIXTURE OF MONOMERIC BIFUNCTIONAL REACTANT CONSISTING FUNCTIONALLY OF AT LEAST TWO MOLAR PROPORTIONS OF ALKYLENE GLYCOL, WITH ONE MOLAR PROPORTION OF A MIXTURE OF DICARBOXYLATE MONOMERS CONSISTING OF N,N''-BIS(P-CARBOXYBENZOYL)ALKYLENE DIAMINE, AND TEREPHTHALIC ACID, EACH OF SAID SLKYLENE GROUPS CONTAINING 2-10 CARBON ATOMS, SAID TEREPHTHALIC ACID IN COMBINED FORM AMOUNTING TO 5-90 MOLE PERCENT OF TOTAL AMOUNT OF SAID TEREPHTHALIC ACID AND SAID N,N''-BIS(P-CARBOXYBENZOYL)ALKYLENE DIAMINE.
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) | 1961-09-08 | 1962-03-10 | 1962-09-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-09-08 | 1966-03-10 | 1966-09-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-09-08 | 1970-03-10 | 1970-09-09 | $7700.00 | Window Closed / Lapsed |