US2852568A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Preparation of cycloalkadienyl derivatives of phenolic compounds
Assignee: Universal Oil Products Co
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Filing: 1956-09-13
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Granted: 1958-09-16
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Expires: 1976-09-13
Abstract
No abstract record available.
Inventors
- 👤 Schmerling Louis
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 13:34
CPC Classifications
C; C07; C07C; C07C37/00; C07C37/11; C07C37/18; C07C2601/00; C07C2601/06; C07C2601/10
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
38 words
A PROCESS FOR THE PREPARATION OF P-(2,4-CYCLOPENTADIENYLMETHYL)PHENOL WHICH COMPRISES CONDENSING CYCLOPENTADIENYL SODIUM WITH P-(CHLOROMETHYL)PHENOL AT A TEMPERATURE IN THE RANGE OF FROM ABOUT 0* TO ABOUT 100*C. IN THE PRESENCE OF AN ALCOHOL, AND RECOVERING THE RESULTANT P-(2,4-CYCLOPENTADIENYLMETHYL)PHENOL.
Claim 2
Dependent Claim
38 words
A PROCESS FOR THE PREPARATION OF P-(2,4-CYCLOPENTADIENYLMETHYL)PHENOL WHICH COMPRISES CONDENSING CYCLOPENTADIENYL SODIUM WITH P-(CHLOROMETHYL)PHENOL AT A TEMPERATURE IN THE RANGE OF FROM ABOUT 0* TO ABOUT 100*C. IN THE PRESENCE OF AN ALCOHOL, AND RECOVERING THE RESULTANT P-(2,4-CYCLOPENTADIENYLMETHYL)PHENOL.
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) | 1961-09-15 | 1962-03-17 | 1962-09-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-09-15 | 1966-03-17 | 1966-09-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-09-15 | 1970-03-17 | 1970-09-16 | $7700.00 | Window Closed / Lapsed |