Patent US2901465A successfully refreshed from Google Patents.
US2901465A
Expired / Lapsed
US
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Polyester and process of making the same
Assignee: Sherwin Williams Co
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Filing: 1955-10-06
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Granted: 1959-08-25
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Expires: 1975-10-06
Abstract
No abstract record available.
Inventors
- 👤 James H Sample
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 09:52
CPC Classifications
C; C08; C08G; C08G63/00; C08G63/02; C08G63/12; C08G63/123; C08G63/127; C08G63/78; C08G63/82; C08L; C08L67/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
87 words
THE PROCESS OF MAKING A VISCID OIL-FREE COMPOSITION OF MATTER HAVING AN ACID VALUE LESS THAN 5 WHICH COMPRISES HEATING TOGETHER AT A TEMPERATURE BETWEEN ABOUT 350* F, AND 450* F, A SATURATED ALIPHATIC POLYOL CONTAINING AT LEAST 3 OH GROUPS ATTACHED TO DIFFERENT NONADJACENT CARBON ATOMS, AN ALKYL DI-ESTER OF AN AROMATIC DIBASIC ACID SELECTED FROM THE GROUP CONSISTING OF ISOPHTHALIC ACID, TEREPHTHALIC ACID, AND MIXTURES THEREOF, THE ALKYL GROUP CONTAINING FROM 1 TO 4 CARBON ATOMS, AND AN ALIPHATIC DIBASIC ACID HAVING THE GENERAL FORMULA
Claim 2
Dependent Claim
87 words
THE PROCESS OF MAKING A VISCID OIL-FREE COMPOSITION OF MATTER HAVING AN ACID VALUE LESS THAN 5 WHICH COMPRISES HEATING TOGETHER AT A TEMPERATURE BETWEEN ABOUT 350* F, AND 450* F, A SATURATED ALIPHATIC POLYOL CONTAINING AT LEAST 3 OH GROUPS ATTACHED TO DIFFERENT NONADJACENT CARBON ATOMS, AN ALKYL DI-ESTER OF AN AROMATIC DIBASIC ACID SELECTED FROM THE GROUP CONSISTING OF ISOPHTHALIC ACID, TEREPHTHALIC ACID, AND MIXTURES THEREOF, THE ALKYL GROUP CONTAINING FROM 1 TO 4 CARBON ATOMS, AND AN ALIPHATIC DIBASIC ACID HAVING THE GENERAL FORMULA
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) | 1962-08-24 | 1963-02-23 | 1963-08-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-08-24 | 1967-02-23 | 1967-08-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-08-24 | 1971-02-23 | 1971-08-25 | $7700.00 | Window Closed / Lapsed |