US2899470A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Purification of polyalkylphenols
Assignee: —
•
Filing: —
•
Granted: 1959-08-11
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Expires: 1976-08-11
Abstract
No abstract record available.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 19:01
CPC Classifications
C; C07; C07F; C07F5/00; C07F5/02; C07F5/04; C07C; C07C37/00; C07C37/68; C07C37/86
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
92 words
THE METHOD OF SEPARATING DIORTHO TERITARY ALKYL SUBSTITUTED PHENOL FROM A PHENOLIC COMPOUND WHICH HAS AT LEAST ONE UNSUBSITUTED ORTHO POSITON WHICH COMPRISES THE STEPS OF HEATING A MIXTURE CONTAINING SAID PHENOLIC COMPOUNDS WITH A TRIALKYL BORATE AT A TEMPERATURE ABOVE THE MELTING POINT OF THE MIXTURE THE AMOUNT OF THE TRIALKYL BORATE EMPLOYED BEING AT LEAST SUFFICIENT TO REACT WITH A SUBSTANTIAL PORTION OF THE PHENOLIC COMPOUND HAVING AN UNSUBSTITUTED ORTHO POSITION, AND THEREBY FRACTINALLY DISTILLING THE REACTION MIXTURE AND SEPARATELY COLLECTING THE DIORTHO ALKYL SUBSTITUTED PHENOL AS IT DISTILLS OVER.
Claim 2
Independent Claim
92 words
THE METHOD OF SEPARATING DIORTHO TERITARY ALKYL SUBSTITUTED PHENOL FROM A PHENOLIC COMPOUND WHICH HAS AT LEAST ONE UNSUBSITUTED ORTHO POSITON WHICH COMPRISES THE STEPS OF HEATING A MIXTURE CONTAINING SAID PHENOLIC COMPOUNDS WITH A TRIALKYL BORATE AT A TEMPERATURE ABOVE THE MELTING POINT OF THE MIXTURE THE AMOUNT OF THE TRIALKYL BORATE EMPLOYED BEING AT LEAST SUFFICIENT TO REACT WITH A SUBSTANTIAL PORTION OF THE PHENOLIC COMPOUND HAVING AN UNSUBSTITUTED ORTHO POSITION, AND THEREBY FRACTINALLY DISTILLING THE REACTION MIXTURE AND SEPARATELY COLLECTING THE DIORTHO ALKYL SUBSTITUTED PHENOL AS IT DISTILLS OVER.
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) | 1962-08-10 | 1963-02-09 | 1963-08-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-08-10 | 1967-02-09 | 1967-08-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-08-10 | 1971-02-09 | 1971-08-11 | $7700.00 | Window Closed / Lapsed |