US3020263A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Polyester resins
Assignee: Union Carbide Corp
•
Filing: 1958-10-31
•
Granted: 1962-02-06
•
Expires: 1978-10-31
Abstract
No abstract record available.
Inventors
- 👤 Jr Talmage D Foster
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 18:38
CPC Classifications
C; C08; C08G; C08G63/00; C08G63/66
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
43 words
A PROCESS FOR THE PRODUCTION OF RESINOUS POLYESTERS WHICH COMPRISES (1) FORMING AN INTERMEDIATE POLYESTER CONDENSATE BY HEATING AND CONDENSING AT A TEMPERATURE WITHIN THE RANGE BETWEEN ABOUT 125* C. AND 225* C. A MIXTURE COMPRISING (A) A SPIROBI(META-DIOXANE) COMPOUND HAVING THE STRUCTURE
Claim 2
Dependent Claim
43 words
A PROCESS FOR THE PRODUCTION OF RESINOUS POLYESTERS WHICH COMPRISES (1) FORMING AN INTERMEDIATE POLYESTER CONDENSATE BY HEATING AND CONDENSING AT A TEMPERATURE WITHIN THE RANGE BETWEEN ABOUT 125* C. AND 225* C. A MIXTURE COMPRISING (A) A SPIROBI(META-DIOXANE) COMPOUND HAVING THE STRUCTURE
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) | 1965-02-05 | 1965-08-07 | 1966-02-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-02-05 | 1969-08-07 | 1970-02-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-02-05 | 1973-08-07 | 1974-02-06 | $7700.00 | Window Closed / Lapsed |