US3091645A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Bisphenol preparation
Assignee: —
•
Filing: —
•
Granted: 1963-05-28
•
Expires: 1980-05-28
Abstract
No abstract record available.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 11:06
CPC Classifications
C; C07; C07C; C07C29/00; C07C29/09; C07C29/10; C07C37/00; C07C37/11; C07C37/16; C07C37/20; C07C43/00; C07C43/02; C07C43/20; C07C43/23
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
156 words
A PROCESS FOR PREPARING BIS(3,5-DIALKYL-HYDROXYPHENYL) METHANE WHICH COMPRISES REACTING TOGETHER A DIALKYPHENOL WHEREIN TWO OF THE THREE RING CARBON ATOMS ORTHO AND PARA TO THE HYDROXYL GROUP ARE EACH SUBSTITUTED WITH AN ALKYL RADICAL HAVING UP TO 8 CARBON ATOMS AND THE THIRD RING CARBON ATOM OF THE THREE RING CARBON ATOMS ORTHO AND PARA TO THE HYDROXYL GROUP HAS A REPLACEABLE HYDROGEN ATOM, AT LEAST ONE OF SAID ALKYL RADICALS BEING A TERTIARY ALKYL RADICAL HAVING AT LEAST FOUR CARBON ATOMS AND BEING ATTACHED TO AN ORTHO RING CARBON ATOM, AND A 3,4-DIALKY-MONOHYDROXYBENZYL ALCOHOL WHEREIN EACH OF THE ALKYL RADICALS HAS UP TO 8 CARBON ATOMS AND ONE OF THE ALKYL RADICALS HAS AT LEAST FOUR CARBON AATOMS AND IS A TERTIARY ALKYL RADICAL IN A SOLVENT CONSISTING ESSENTIALLY OF A MONOHYDRIC ALKONAL WHEREIN THE HYDROXYLIC CARBON ATOM IS ATTACHED TO AT LEAST 2 CARBON ATOMS, IN THE PRESENCE OF A CATALYST AMOUNT OF BASE.
Claim 2
Dependent Claim
156 words
A PROCESS FOR PREPARING BIS(3,5-DIALKYL-HYDROXYPHENYL) METHANE WHICH COMPRISES REACTING TOGETHER A DIALKYPHENOL WHEREIN TWO OF THE THREE RING CARBON ATOMS ORTHO AND PARA TO THE HYDROXYL GROUP ARE EACH SUBSTITUTED WITH AN ALKYL RADICAL HAVING UP TO 8 CARBON ATOMS AND THE THIRD RING CARBON ATOM OF THE THREE RING CARBON ATOMS ORTHO AND PARA TO THE HYDROXYL GROUP HAS A REPLACEABLE HYDROGEN ATOM, AT LEAST ONE OF SAID ALKYL RADICALS BEING A TERTIARY ALKYL RADICAL HAVING AT LEAST FOUR CARBON ATOMS AND BEING ATTACHED TO AN ORTHO RING CARBON ATOM, AND A 3,4-DIALKY-MONOHYDROXYBENZYL ALCOHOL WHEREIN EACH OF THE ALKYL RADICALS HAS UP TO 8 CARBON ATOMS AND ONE OF THE ALKYL RADICALS HAS AT LEAST FOUR CARBON AATOMS AND IS A TERTIARY ALKYL RADICAL IN A SOLVENT CONSISTING ESSENTIALLY OF A MONOHYDRIC ALKONAL WHEREIN THE HYDROXYLIC CARBON ATOM IS ATTACHED TO AT LEAST 2 CARBON ATOMS, IN THE PRESENCE OF A CATALYST AMOUNT OF BASE.
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) | 1966-05-27 | 1966-11-26 | 1967-05-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-05-27 | 1970-11-26 | 1971-05-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-05-27 | 1974-11-26 | 1975-05-28 | $7700.00 | Window Closed / Lapsed |