US3546179A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for the catalytic polycondensation of bis-hydroxyalkyl esters of dicarboxylic acids
Assignee: Hoechst AG
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Filing: 1968-04-10
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Granted: 1970-12-08
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Expires: 1988-04-10
Abstract
No abstract record available.
Inventors
- 👤 Walter Kolier
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 02:47
CPC Classifications
C; C08; C08G; C08G63/00; C08G63/78; C08G63/82; C08G63/87; C07; C07F; C07F7/00; C07F7/02; C07F7/08; C07F7/0834; C07F7/0836; C07F7/18; C07F7/1804; C07F9/00; C07F9/02; C07F9/28; C07F9/38; C07F9/3804; C07F9/3808; C07F9/3821; C07F9/40; C07F9/4003; C07F9/4006; C07F9/4012; C08G63/83
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US3406153A
Cited
US3406152A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-12-07 | 1974-06-08 | 1974-12-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-12-07 | 1978-06-08 | 1978-12-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-12-07 | 1982-06-08 | 1982-12-08 | $7700.00 | Window Closed / Lapsed |