Patent US2551926A successfully refreshed from Google Patents.
US2551926A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Preparation of cycloalkyl ethers
Assignee: Eli Lilly and Co
•
Filing: 1947-09-25
•
Granted: 1951-05-08
•
Expires: 1967-09-25
Abstract
No abstract record available.
Inventors
- 👤 Thomas P Carney
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 17:21
CPC Classifications
C; C07; C07C; C07C69/00; C07C69/76; C07C69/78
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
77 words
IN THE PROCESS OF PREPARING CYCLOALKYL ETHERS OF P-HYDROXYBENZOYL COMPOUNDS BY REACTING A CYCLOALKENE WITH A P-HYDROXYBENZOYL COMPOUND, THE STEP WHICH COMPRISES TREATING A MIXTURE OF A CYCLOALKENE OF THE GROUP CONSISTING OF CYCLOPENTENE AND CYCLOHEXENE AND A P-HYDROXYBENZOYL COMPOUND OF THE CLASS CONSISTING OF PHYDROXYBENZOIC ACID AND LOWER ALKYL ESTERS THEREOF WITH A CATALYST OF THE CLASS CONSISTING OF BORON TRIFLUORIDE AND CONCENTRATED SULFURIC ACID AT A TEMPERATURE OF FROM ABOUT 40* TO ABOUT 125* C.
Claim 2
Dependent Claim
77 words
IN THE PROCESS OF PREPARING CYCLOALKYL ETHERS OF P-HYDROXYBENZOYL COMPOUNDS BY REACTING A CYCLOALKENE WITH A P-HYDROXYBENZOYL COMPOUND, THE STEP WHICH COMPRISES TREATING A MIXTURE OF A CYCLOALKENE OF THE GROUP CONSISTING OF CYCLOPENTENE AND CYCLOHEXENE AND A P-HYDROXYBENZOYL COMPOUND OF THE CLASS CONSISTING OF PHYDROXYBENZOIC ACID AND LOWER ALKYL ESTERS THEREOF WITH A CATALYST OF THE CLASS CONSISTING OF BORON TRIFLUORIDE AND CONCENTRATED SULFURIC ACID AT A TEMPERATURE OF FROM ABOUT 40* TO ABOUT 125* C.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1954-05-07 | 1954-11-06 | 1955-05-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-05-07 | 1958-11-06 | 1959-05-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-05-07 | 1962-11-06 | 1963-05-08 | $7700.00 | Window Closed / Lapsed |