US2497812A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Preparation of pentanediol
Assignee: EIDP Inc
•
Filing: 1946-11-14
•
Granted: 1950-02-14
•
Expires: 1966-11-14
Abstract
No abstract record available.
Inventors
- 👤 Harry B Copelin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 21:20
CPC Classifications
C; C07; C07C; C07C29/00; C07C29/09; C07C29/10; C07C29/103
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
25 words
THE PROCESS FOR THE PRODUCTION OF 1,5-PENTANEDIOL WHICH COMPRISES HYDROGENATING DI-2TETRAHYDROPYRYL ETHER IN A SUBSTANTIALLY NEUTRAL AQUEOUS MEDIUM IN THE PRESENCE OF A HYDROGENATION CATALYST.
Claim 2
Dependent Claim
25 words
THE PROCESS FOR THE PRODUCTION OF 1,5-PENTANEDIOL WHICH COMPRISES HYDROGENATING DI-2TETRAHYDROPYRYL ETHER IN A SUBSTANTIALLY NEUTRAL AQUEOUS MEDIUM IN THE PRESENCE OF A HYDROGENATION CATALYST.
References Cited (Backward Citations)
US2097493A
Cited
US2440929A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1953-02-13 | 1953-08-15 | 1954-02-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-02-13 | 1957-08-15 | 1958-02-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-02-13 | 1961-08-15 | 1962-02-14 | $7700.00 | Window Closed / Lapsed |