Patent US3814724A successfully refreshed from Google Patents.
US3814724A
Expired / Lapsed
US
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Polymerizable liquid compositions for unsaturated polyester resins
Assignee: Maruzen Petrochemical Co Ltd
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Filing: 1973-02-13
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Granted: 1974-06-04
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Expires: 1993-02-13
Abstract
Abstract A POLYMERIZABLE LIQUID COMPOSITION FOR USE IN PREPARING A THERMOSETTING UNSATURATED POLYESTER RESIN HAVING A HIGH CHEMICAL RESISTANCE, ESPECIALLY HIGH ALKALI RESISTANCE, AND A CURED PRODUCT OBTAINED THEREFROM. THE LIQUID COMPOSITON ESSENTIALLY COMPRISES (A) A POLYCONDENSATE OBTAINED BY REACTING (I) 2-METHYLBUTANE-1,3-DIOL, (II) TEREPHTHALIC ACID, ISOPHTHALIC ACID AND/OR ESTERS THEREOF AND (III) AN UNSATURATED DICARBOXYLIC ACID, AND (B) AN ETHYLENICALLY UNSATURATED MONOMER.
Inventors
- 👤 K Nakamura
- 👤 K Yagi
- 👤 H Suzuki
- 👤 M Iriuchijima
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 09:35
CPC Classifications
C; C08; C08G; C08G63/00; C08G63/02; C08G63/12; C08G63/52; C08G63/54
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-06-03 | 1977-12-03 | 1978-06-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-06-03 | 1981-12-03 | 1982-06-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-06-03 | 1985-12-03 | 1986-06-04 | $7700.00 | Window Closed / Lapsed |