Patent US2031875A successfully refreshed from Google Patents.
US3428587A
Expired / Lapsed
US
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Method of preparing linear condensation polyester resins having improved stability
Assignee: Goodyear Tire and Rubber Co
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Filing: 1968-03-13
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Granted: 1969-02-18
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Expires: 1988-03-13
Abstract
No abstract record available.
Inventors
- 👤 Aleksander Piirma
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 13:36
CPC Classifications
C; C08; C08G; C08G63/00; C08G63/78; C08G63/82; C08G63/83; C08K; C08K5/00; C08K5/04; C08K5/09; C08K5/098
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
CA564046A
Cited
CA574113A
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US2758105A
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US2829153A
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US3070575A
Cited
US3079368A
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US3161710A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-02-18 | 1972-08-19 | 1973-02-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-02-18 | 1976-08-19 | 1977-02-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-02-18 | 1980-08-19 | 1981-02-18 | $7700.00 | Window Closed / Lapsed |