US2570403A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Stabilization of phenol alkylates by amines
Assignee: Gulf Research and Development Co
•
Filing: 1949-10-31
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Granted: 1951-10-09
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Expires: 1969-10-31
Abstract
No abstract record available.
Inventors
- 👤 Donald R Stevens
- 👤 Samuel C Camp
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 11:16
CPC Classifications
C; C07; C07C; C07C37/00; C07C37/68; C07C37/88; C07C37/70; C07C37/72; C07C37/74; C07C37/86
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
40 words
A METHOD OF INHIBITING THE DEALKYLATION OF CRUDE ACIDIC ALKYLATED PHENOLS AT ELEVATED TEMPERATURES WHICH COMPRISES WASHING SAID ALKYLATED PHENOLS WITH A NON-ACID AQUEOUS MEDIUM AND ADDING TO THE WASHED ALKYLATED AT LEAST THE STOICHIOMETRIC QUANTITY OF AN ALKALINE AGENT
Claim 2
Independent Claim
40 words
A METHOD OF INHIBITING THE DEALKYLATION OF CRUDE ACIDIC ALKYLATED PHENOLS AT ELEVATED TEMPERATURES WHICH COMPRISES WASHING SAID ALKYLATED PHENOLS WITH A NON-ACID AQUEOUS MEDIUM AND ADDING TO THE WASHED ALKYLATED AT LEAST THE STOICHIOMETRIC QUANTITY OF AN ALKALINE AGENT
References Cited (Backward Citations)
US1933064A
Cited
US2310663A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1954-10-08 | 1955-04-09 | 1955-10-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-10-08 | 1959-04-09 | 1959-10-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-10-08 | 1963-04-09 | 1963-10-09 | $7700.00 | Window Closed / Lapsed |