US3787513A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Aryl substituted methane compounds
Assignee: Phillips Petroleum Co
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Filing: 1971-06-09
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Granted: 1974-01-22
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Expires: 1991-06-09
Abstract
Abstract ARYL SUBSTITUTED METHANE COMPOUNDS ARE PREPARED BY CONTACTING AN AROMATIC ALDEHYDE WITH AN AROMATIC HYDROCARBON IN THE PRESENCE OF BORON TRIFLUORIDE.
Inventors
- 👤 P Stapp
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 18:09
CPC Classifications
C; C07; C07C; C07C2/00; C07C2/86; C07C2/862; C07C2/867; C07C17/00; C07C17/26; C07C17/263; C07C17/2637; C07C2527/00; C07C2527/06; C07C2527/08; C07C2527/12; C07C2527/1213
Claims Analysis
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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) | 1977-01-21 | 1977-07-23 | 1978-01-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-01-21 | 1981-07-23 | 1982-01-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-01-21 | 1985-07-23 | 1986-01-22 | $7700.00 | Window Closed / Lapsed |