US2541747A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Production of hydroxyl compounds by hydrolysis of tetrahydropyryl ethers
Assignee: EIDP Inc
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Filing: 1949-05-21
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Granted: 1951-02-13
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Expires: 1969-05-21
Abstract
No abstract record available.
Inventors
- 👤 Harry B Copelin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 13:35
CPC Classifications
C; C07; C07D; C07D309/00; C07D309/16; C07D309/18; C07C; C07C29/00; C07C29/09; C07C29/10
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
43 words
THE PROCESS WHICH COMPRISES HEATING A TETRAHYDROPYRYL ETHER AT A TEMPERATURE OF AT LEAST 150* C. IN THE PRESENCE OF A CATALYTIC AMOUNT OF AN INORGANIC ACID AND NOT MORE THAN 1% BY WEIGHT OF WATER AND RECOVERING DIHYDROPYRAN AND A HYDROXYL COMPOUND.
Claim 2
Dependent Claim
43 words
THE PROCESS WHICH COMPRISES HEATING A TETRAHYDROPYRYL ETHER AT A TEMPERATURE OF AT LEAST 150* C. IN THE PRESENCE OF A CATALYTIC AMOUNT OF AN INORGANIC ACID AND NOT MORE THAN 1% BY WEIGHT OF WATER AND RECOVERING DIHYDROPYRAN AND A HYDROXYL COMPOUND.
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) | 1954-02-12 | 1954-08-14 | 1955-02-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-02-12 | 1958-08-14 | 1959-02-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-02-12 | 1962-08-14 | 1963-02-13 | $7700.00 | Window Closed / Lapsed |