US3390132A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Polyester resins
Assignee: Hercules LLC
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Filing: 1964-05-27
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Granted: 1968-06-25
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Expires: 1984-05-27
Abstract
No abstract record available.
Inventors
- 👤 John F Walker
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 11:02
CPC Classifications
D; D21; D21H; D21H19/00; D21H19/10; D21H19/14; D21H19/24; D21H19/28; B; B32; B32B; B32B27/00; C; C08; C08G; C08G63/00; C08G63/02; C08G63/12; C08G63/16; C08G63/18; C08G63/199; C09; C09D; C09D167/00; C09D167/02; C09J; C09J167/00; C09J167/02; D21H27/00; D21H27/18; D21H27/22; D21H27/26; D21H27/28
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
122 words
A LINEAR THERMOPLASTIC POLYESTER RESIN HAVING A SPECIFIC VISCOSITY OF AT LEAST ABOUT 0.4 MEASURED AT 25*C. ON A $% SOLUTION OF SAID RESIN IN A 60:40 BY WEIGHT MIXTURE OF PHENOL AND TETRACHLOROETHANE, AND MADE BY THE MELT POLYMERIZATION OF REACTANTS CONSISTING ESSENTIALLY OF (1) ACID MATERIAL OF WHICH (A) ABOUT 25-40 MOLE PERCENT THEREOF IS SELECTED FROM THE GROUP CONSISTING OF HEXAHYDROTEREPHTHALIC ACID AND LOWER DIALKYL ESTERS THEREOF, AND (B) ABOUT 75-60 MOLE PERCENT OF WHICH IS SELECTED FROM THE GROUP CONSISTING OF TEREPHTHALIC ACID AND LOWER IALKYL ESTERS THEREOF, AND (2) A GLYCOL HAVING THE FORMULA HO(CH2)NOH, WHEREIN N IS A WHOLE NUMBER OF 2-10, SAID GLYCOL BEING IN EXCESS OF ONE MOLE PER MOLE OF SAID ACID AMTERIAL.
Claim 2
Dependent Claim
122 words
A LINEAR THERMOPLASTIC POLYESTER RESIN HAVING A SPECIFIC VISCOSITY OF AT LEAST ABOUT 0.4 MEASURED AT 25*C. ON A $% SOLUTION OF SAID RESIN IN A 60:40 BY WEIGHT MIXTURE OF PHENOL AND TETRACHLOROETHANE, AND MADE BY THE MELT POLYMERIZATION OF REACTANTS CONSISTING ESSENTIALLY OF (1) ACID MATERIAL OF WHICH (A) ABOUT 25-40 MOLE PERCENT THEREOF IS SELECTED FROM THE GROUP CONSISTING OF HEXAHYDROTEREPHTHALIC ACID AND LOWER DIALKYL ESTERS THEREOF, AND (B) ABOUT 75-60 MOLE PERCENT OF WHICH IS SELECTED FROM THE GROUP CONSISTING OF TEREPHTHALIC ACID AND LOWER IALKYL ESTERS THEREOF, AND (2) A GLYCOL HAVING THE FORMULA HO(CH2)NOH, WHEREIN N IS A WHOLE NUMBER OF 2-10, SAID GLYCOL BEING IN EXCESS OF ONE MOLE PER MOLE OF SAID ACID AMTERIAL.
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) | 1971-06-25 | 1971-12-25 | 1972-06-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-06-25 | 1975-12-25 | 1976-06-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-06-25 | 1979-12-25 | 1980-06-25 | $7700.00 | Window Closed / Lapsed |