US3413336A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for the preparation of aryl esters of aromatic dicarboxylic acids
Assignee: Chemische Werke Witten GmbH
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Filing: 1964-07-31
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Granted: 1968-11-26
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Expires: 1984-07-31
Abstract
No abstract record available.
Inventors
- 👤 Hulsmann Hans-Leo
- 👤 Renckhoff Gustav
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 14:16
CPC Classifications
C; C07; C07C; C07C67/00; C07C67/02; C07C67/10; C08; C08G; C08G63/00; C08G63/02; C08G63/12; C08G63/16; C08L; C08L67/00
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
GB314646A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1971-11-26 | 1972-05-27 | 1972-11-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-11-26 | 1976-05-27 | 1976-11-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-11-26 | 1980-05-27 | 1980-11-26 | $7700.00 | Window Closed / Lapsed |