US2532498A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Polymerizable polyesters
Assignee: Libbey Owens Ford Glass Co
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Filing: 1948-06-22
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Granted: 1950-12-05
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Expires: 1968-06-22
Abstract
No abstract record available.
Inventors
- 👤 Harold A Hoppens
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 12:29
CPC Classifications
C; C08; C08L; C08L67/00; C08G; C08G63/00; C08G63/02; C08G63/12; C08G63/52; C08G77/00; C08G77/42; C09; C09D; C09D167/00; C09D167/06
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
64 words
A LINEAR UNSATURATED POLYSTER OF IMPROVED STABILITY WHICH IS CAPABLE OF HARDENING BY ADDITION POLYMERIZATION TO A BODY HAVING HIGH COMPRESSIVE STRENGTH AND WHICH IS THE PRODUCT OF THE ESTERIFICATION REACTION, WITHOUT SUBSTANTIAL ADDITION POLYMERIZATION, OF INGREDIENTS CONSISTING ESSENTIALLY OF THREE MOLS OF AN UNSUBSTITUTED BUTENEDIOIC ACID, FROM ONE TO TWO MOLS OF ETHYLENE GLYCOL AND FROM ONE TO TWO MOLS OF PROPYLENE GLYCOL.
Claim 2
Dependent Claim
64 words
A LINEAR UNSATURATED POLYSTER OF IMPROVED STABILITY WHICH IS CAPABLE OF HARDENING BY ADDITION POLYMERIZATION TO A BODY HAVING HIGH COMPRESSIVE STRENGTH AND WHICH IS THE PRODUCT OF THE ESTERIFICATION REACTION, WITHOUT SUBSTANTIAL ADDITION POLYMERIZATION, OF INGREDIENTS CONSISTING ESSENTIALLY OF THREE MOLS OF AN UNSUBSTITUTED BUTENEDIOIC ACID, FROM ONE TO TWO MOLS OF ETHYLENE GLYCOL AND FROM ONE TO TWO MOLS OF PROPYLENE GLYCOL.
References Cited (Backward Citations)
US2089196A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1953-12-04 | 1954-06-05 | 1954-12-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-12-04 | 1958-06-05 | 1958-12-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-12-04 | 1962-06-05 | 1962-12-05 | $7700.00 | Window Closed / Lapsed |