US3278640A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Segmented copolyester comprising aromatic and aliphatic polyester segments
Assignee: GE Chemicals Inc
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Filing: 1963-03-11
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Granted: 1966-10-11
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Expires: 1983-03-11
Abstract
No abstract record available.
Inventors
- 👤 Eugene P Goldberg
- 👤 Scardiglia Frank
- 👤 Chen Bing-Jen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 15:15
CPC Classifications
C; C08; C08G; C08G63/00; C08G63/78; C08G63/82; C08G63/87
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
68 words
LINEAR SEGMENTED BLOCK COPOLYMER HAVING AN INTRINSIC VISCOSITY OF AT LEAST 0.3 DL./G. MEASURED IN 1,1,2,2TETRACHLOROETHANE AT ROOM TEMPERATURE, CONSISTING ESSENTIALLY OF POLYESTER STRUCTURAL UNITS PREPARED FROM DICARBOXYLIC ACID CHLORIDES REACTED WITH AT LEAST ONE COMPOUND SELECTED FROM THE GROUP CONSISTNG OF GLYCOLS AND ALKALI METAL SALTS OF PHENOLS, SAID COPOLYMER CONTAINING FROM ABOUT 5 PERCENT TO ABOUT 50 PERCENT RECURRING ALIPHATIC POLYESTER STRUCTURAL UNITS OF THE FORMULA
Claim 2
Dependent Claim
68 words
LINEAR SEGMENTED BLOCK COPOLYMER HAVING AN INTRINSIC VISCOSITY OF AT LEAST 0.3 DL./G. MEASURED IN 1,1,2,2TETRACHLOROETHANE AT ROOM TEMPERATURE, CONSISTING ESSENTIALLY OF POLYESTER STRUCTURAL UNITS PREPARED FROM DICARBOXYLIC ACID CHLORIDES REACTED WITH AT LEAST ONE COMPOUND SELECTED FROM THE GROUP CONSISTNG OF GLYCOLS AND ALKALI METAL SALTS OF PHENOLS, SAID COPOLYMER CONTAINING FROM ABOUT 5 PERCENT TO ABOUT 50 PERCENT RECURRING ALIPHATIC POLYESTER STRUCTURAL UNITS OF THE FORMULA
Claim 3
Dependent Claim
138 words
THE PROCESS OF PREPARING A SEGMENTED BLOCK COPOLYMER CONSISTING ESSENTIALLY OF RECURRING ALIPHATIC POLYESTER SEGMENTS AND RECURRING AROMATIC POLYESTER SEGMENTS WHICH COMPRISES THE STEPS OF: REACTING AT LEAST ONE ALIPHATIC DICARBOXYLIC ACID CHLORIDE WITH AT LEAST ONE GLYCOL TO PROVIDE AN ACID CHLORIDE TERMINATED POLYESTER HAVING A MOLECULAR WEIGHT BETWEEN ABOUT 1,000 AND 20,000; ADDING SAID ALIPHATIC POLYESTER TO AT LEAST ONE AROMATIC DICARBOXYLIC ACID CHLORIDE; REACTING SAID MIXTURE WITH AN AQUEOUS SOLUTION OF AT LEAST ONE ALKALI METAL SALT AND AT LEAST ONE DIPHENOL, TO THEREBY PROVIDE A SEGMENTED BLOCK COPOLYMER HAVING AN INTRINSIC VISCOSITY IN EXCESS OF 0.3 DL./G. WHEN MEASURED IN 1,1,2,2-TETRACHLORETHANE AT ROOM TEMPERATURE, WHICH POLYESTER CONTAINS FROM ABOUT 5 PERCENT TO ABOUT 50 PERCENT BY WEIGHT ALIPHATIC POLYESTER SEGMENTS AND CORRESPONDINGLY ABOUT 95 PERCENT TO ABOUT 50 PERCENT BY WEIGHT AROMATIC POLYESTER SEGMENTS.
Claim 4
Dependent Claim
138 words
THE PROCESS OF PREPARING A SEGMENTED BLOCK COPOLYMER CONSISTING ESSENTIALLY OF RECURRING ALIPHATIC POLYESTER SEGMENTS AND RECURRING AROMATIC POLYESTER SEGMENTS WHICH COMPRISES THE STEPS OF: REACTING AT LEAST ONE ALIPHATIC DICARBOXYLIC ACID CHLORIDE WITH AT LEAST ONE GLYCOL TO PROVIDE AN ACID CHLORIDE TERMINATED POLYESTER HAVING A MOLECULAR WEIGHT BETWEEN ABOUT 1,000 AND 20,000; ADDING SAID ALIPHATIC POLYESTER TO AT LEAST ONE AROMATIC DICARBOXYLIC ACID CHLORIDE; REACTING SAID MIXTURE WITH AN AQUEOUS SOLUTION OF AT LEAST ONE ALKALI METAL SALT AND AT LEAST ONE DIPHENOL, TO THEREBY PROVIDE A SEGMENTED BLOCK COPOLYMER HAVING AN INTRINSIC VISCOSITY IN EXCESS OF 0.3 DL./G. WHEN MEASURED IN 1,1,2,2-TETRACHLORETHANE AT ROOM TEMPERATURE, WHICH POLYESTER CONTAINS FROM ABOUT 5 PERCENT TO ABOUT 50 PERCENT BY WEIGHT ALIPHATIC POLYESTER SEGMENTS AND CORRESPONDINGLY ABOUT 95 PERCENT TO ABOUT 50 PERCENT BY WEIGHT AROMATIC POLYESTER SEGMENTS.
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) | 1969-10-10 | 1970-04-11 | 1970-10-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-10-10 | 1974-04-11 | 1974-10-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-10-10 | 1978-04-11 | 1978-10-11 | $7700.00 | Window Closed / Lapsed |