US3062896A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Polyphenol preparation
Assignee: Shell USA Inc
•
Filing: 1959-09-28
•
Granted: 1962-11-06
•
Expires: 1979-09-28
Abstract
No abstract record available.
Inventors
- 👤 Frank C Davis
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 00:42
CPC Classifications
C; C07; C07C; C07C37/00; C07C37/11; C07C37/18; C07C37/64; C07C37/66; C10; C10M; C10M2207/00; C10M2207/02; C10M2207/023; C10M2207/024; C10N; C10N2050/00; C10N2050/10
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
69 words
THE PREPARATION OF 1,4-BIS(3,5-DI-TERT-ALKYL-4-HYDROXYBENZYL)TETRAAKYLBENZENE, COMPRISING REACTING TOGETHER THE ALKALI METAL SALT OF 2,6-DI-TERT ALKYLPHENOL, AND 1,4-BIS(HALOMETHYL)TETRAALKYLBENZENE, EACH OF SAID ALKYL GROUPS HAVING UP TO EIGHT CARBON ATOMS, UNDER AN INERT ATMOSPHERE IN AN INERT SUBSTANTIALLY ANHYDROUS ORGANIC SOLVENT OF DIELECTRIC CONSTANT OF AT LEAST ABOUT 20 AND SELECTED FROM THE GROUP CONSISTING OF FORMAMIDE, DIMETHYL FORMAMIDE, ACETAMIDE, NITROMETHANE, NITROETHANE, ACETONITRILE, PROPIONITRILE, BUTYRONITRILE, METHYL THIOCYANATE, ETHYL THIOCYANATE, TETRAHYDROFURANE AND SULFOLANE.
Claim 2
Dependent Claim
69 words
THE PREPARATION OF 1,4-BIS(3,5-DI-TERT-ALKYL-4-HYDROXYBENZYL)TETRAAKYLBENZENE, COMPRISING REACTING TOGETHER THE ALKALI METAL SALT OF 2,6-DI-TERT ALKYLPHENOL, AND 1,4-BIS(HALOMETHYL)TETRAALKYLBENZENE, EACH OF SAID ALKYL GROUPS HAVING UP TO EIGHT CARBON ATOMS, UNDER AN INERT ATMOSPHERE IN AN INERT SUBSTANTIALLY ANHYDROUS ORGANIC SOLVENT OF DIELECTRIC CONSTANT OF AT LEAST ABOUT 20 AND SELECTED FROM THE GROUP CONSISTING OF FORMAMIDE, DIMETHYL FORMAMIDE, ACETAMIDE, NITROMETHANE, NITROETHANE, ACETONITRILE, PROPIONITRILE, BUTYRONITRILE, METHYL THIOCYANATE, ETHYL THIOCYANATE, TETRAHYDROFURANE AND SULFOLANE.
References Cited (Backward Citations)
US2634297A
Cited
US2903346A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1965-11-05 | 1966-05-07 | 1966-11-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-11-05 | 1970-05-07 | 1970-11-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-11-05 | 1974-05-07 | 1974-11-06 | $7700.00 | Window Closed / Lapsed |