Patent US3692844A successfully refreshed from Google Patents.
US3692844A
Expired / Lapsed
US
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Process for preparing a terpene phenolic condensation product
Assignee: Pennsylvania Industrial Chemical Corp
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Filing: 1968-06-24
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Granted: 1972-09-19
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Expires: 1988-06-24
Abstract
Abstract A continuous process for preparing a terpene phenolic compound by alkylating phenol with a cyclic terpene in the presence of boron trifluoride, withdrawing a resinous product characterized by its high phenol reactivity and recycling the distilled boron trifluoride and excess phenol.
Inventors
- 👤 Samuel D Hollis
- 👤 Philip E Winston Jr
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 14:20
CPC Classifications
C; C08; C08G; C08G61/00
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
29 words
A process as recited in claim 1 in which the concentration of boron trifluoride is in the range of 0.05 to 1.5 percent by weight of the terpene utilized.
References Cited (Backward Citations)
US2343845A
Cited
US2596235A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-09-19 | 1976-03-20 | 1976-09-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-09-19 | 1980-03-20 | 1980-09-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-09-19 | 1984-03-20 | 1984-09-19 | $7700.00 | Window Closed / Lapsed |