US3577366A
Expired / Lapsed
US
⏱️ 0.0 years remaining
9,10-bridged anthracene compounds
Assignee: Eastman Kodak Co
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Filing: 1969-03-28
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Granted: 1971-05-04
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Expires: 1989-03-28
Abstract
Abstract NEW 9,10-BIRDGED ANTHRACENE COMPOUNDS, SUCH AS 9,10-BIS(HYDROXYMETHYL)TRIPTYCENE AND 9,10-DIHYDRO9,10-BIS(HYDROXYMETHYL)-9,10-ETHANOANTHRACENE IMPROVE CERTAIN PROPERTIES OF POLYESTERS PREPARED BY POLYMERIZATION OF A DICARBOXYLIC ACID, SUCH AS TEREPHTHALIC ACID, AND AN ALKYLENE GLYCOL, SUCH AS ETHYLENE GLYCOL, WHEN INCORPORATED IN THE POLYMERIZATION MIXTURE. THE 9,10-BIS(ACYLOXYALKYL)-9,10-BRIDGED ANTHRACENE COMPOUNDS FROM WHICH THE ANTHRACENE COMPOUNDS USED IN PREPARING THE POLYESTERS ARE PREPARED ARE NEW COMPOUNDS.
Inventors
- 👤 Bruce H Klanderman
- 👤 Jan W H Faber
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 19:19
CPC Classifications
C; C07; C07D; C07D209/00; C07D209/56; C07D209/58; C07C; C07C61/00; C07C61/16; C07C61/39; C08; C08G; C08G63/00; C08G63/02; C08G63/12; C08G63/16; C08G63/18; C08G63/181; C08G63/185; C08G63/187; 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) | 1974-05-03 | 1974-11-02 | 1975-05-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-05-03 | 1978-11-02 | 1979-05-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-05-03 | 1982-11-02 | 1983-05-04 | $7700.00 | Window Closed / Lapsed |