Patent US2616931A successfully refreshed from Google Patents.
US2616931A
Expired / Lapsed
US
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alkylationof p-alkoxyphenols
Assignee: —
•
Filing: —
•
Granted: 1952-11-04
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Expires: 1969-11-04
Abstract
No abstract record available.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 08:03
CPC Classifications
C; C07; C07C; C07C43/00; C07C43/02; C07C43/20; C07C43/23; C07C41/00; C07C41/01; C07C41/14; C07C37/00; C07C37/11; C07C37/16; C07C39/00; C07C39/02; C07C39/06; C07C41/18; C07C41/30
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
44 words
A METHOD OF PRODUCING HIGH YIELDS OF 2TERT,-BUTYL-4-METHOXYPHENOL AND LOW YIELDS OF 3TERT,-BUTYL-4-METHOXYPHENOL WHICH COMPRISES REACTING P-METHOXYPHENOL WITH TERT-BUTYL-ALCOHOL IN A RATIO OF AT LEAST TWO MOLES OF P-ALKOXYPHENOL PER MOLE OF TERT-BUTYL-ALCOHOL AT AN ALKYLATING TEMPERATURE OF NOT MORE THAN ABOUT 175* C.
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) | 1955-11-04 | 1956-05-05 | 1956-11-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-11-04 | 1960-05-05 | 1960-11-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-11-04 | 1964-05-05 | 1964-11-04 | $7700.00 | Window Closed / Lapsed |