Patent US3453240A successfully refreshed from Google Patents.
US3453240A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Polyester resin treatment with ethylene glycol
Assignee: Goodyear Tire and Rubber Co
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Filing: 1964-09-24
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Granted: 1969-07-01
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Expires: 1984-09-24
Abstract
No abstract record available.
Inventors
- 👤 Bernard J Plaster
- 👤 Richard J Stein
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 13:04
CPC Classifications
C; C08; C08G; C08G63/00; C08G63/78; C08G63/80
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
69 words
IN THE PROCESS OF PREPARING HIGHLY POLYMERIC LINEAR POLYESTERS BY SOLID STATE POLYMERIZATION HAVING AN INTRINSIC VISCOSITY OF AT LEAST 0.6 THE IMPROVEMENT WHICH CONSISTS ESSENTIALLY OF TREATING THE RESIN IN SOLID STATE WITH ETHYLENE GLYCOL AT A TEMPERATURE BELOW THE MELTING TEMPERATURE OF THE RESIN AND THE SUBJECTING THE RESIN TO SOLID STATE CONDENSATION POLYMERIZATION AT A TEMPERATURE LOWER THAN 20*C. BELOW THE MELTING TEMPERATURE OF THE RESIN.
Claim 2
Dependent Claim
69 words
IN THE PROCESS OF PREPARING HIGHLY POLYMERIC LINEAR POLYESTERS BY SOLID STATE POLYMERIZATION HAVING AN INTRINSIC VISCOSITY OF AT LEAST 0.6 THE IMPROVEMENT WHICH CONSISTS ESSENTIALLY OF TREATING THE RESIN IN SOLID STATE WITH ETHYLENE GLYCOL AT A TEMPERATURE BELOW THE MELTING TEMPERATURE OF THE RESIN AND THE SUBJECTING THE RESIN TO SOLID STATE CONDENSATION POLYMERIZATION AT A TEMPERATURE LOWER THAN 20*C. BELOW THE MELTING TEMPERATURE OF THE RESIN.
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) | 1972-06-30 | 1972-12-30 | 1973-07-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-06-30 | 1976-12-30 | 1977-07-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-06-30 | 1980-12-30 | 1981-07-01 | $7700.00 | Window Closed / Lapsed |