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US3769331A
Expired / Lapsed
US
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Process for the preparation of acetates of 1,3-propanediol
Assignee: Hoechst AG
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Filing: 1971-11-19
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Granted: 1973-10-30
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Expires: 1991-11-19
Abstract
Abstract ACETATES OF 1,3-PROPANEDIOL ARE PREPARED BY CATALYTIC HYDROGENATION OF O-ACETOXY-PROPIONALDEHYDE IN ACETIC SOLUTION.
Inventors
- 👤 H Kuckertz
- 👤 H Arpe
- 👤 L Schulz
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 06:42
CPC Classifications
C; C07; C07C; C07C67/00; C07C67/44; C07C67/28; C07C67/29
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) | 1976-10-29 | 1977-04-30 | 1977-10-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-10-29 | 1981-04-30 | 1981-10-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-10-29 | 1985-04-30 | 1985-10-30 | $7700.00 | Window Closed / Lapsed |