US2727928A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Stabilization of alkyl phenol compounds
Assignee: Shell Development Co
•
Filing: 1953-12-23
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Granted: 1955-12-20
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Expires: 1973-12-23
Abstract
No abstract record available.
Inventors
- 👤 Jacob J Menn
- 👤 Edwin G Wallace
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 10:22
CPC Classifications
C; C07; C07C; C07C37/00; C07C37/68; C07C37/88
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
81 words
THE METHOD FOR IMPROVING THE COLOR- AND ODORSTABILITY OF AN ALKYL PHENOL WHICH TENDS TO BECOME DISCOLORED AND TO DEVELOP AN ODOR WITH AGE WHICH COMPRISES TREATING SAID ALKYL PHENOL WITH 0.01% TO 5%, BASED ON THE WEIGHT OF ALKYL PHENOL, OF POLYFUNCTIONAL ACID OF PHOSPHORUS COMPOUND AT A TEMPERATURE BELOW 125*C. FOR A PERIOD BETWEEN ABOUT 2 MINUTES AND 3 HOURS AT WHICH NO SUBSTANTIAL CONVERSION OF SAID ALKYL PHENOL TAKES PLACE RECOVERING THE STARTING ALKYL PHENOL AS STABILIZED PRODUCT.
Claim 2
Independent Claim
81 words
THE METHOD FOR IMPROVING THE COLOR- AND ODORSTABILITY OF AN ALKYL PHENOL WHICH TENDS TO BECOME DISCOLORED AND TO DEVELOP AN ODOR WITH AGE WHICH COMPRISES TREATING SAID ALKYL PHENOL WITH 0.01% TO 5%, BASED ON THE WEIGHT OF ALKYL PHENOL, OF POLYFUNCTIONAL ACID OF PHOSPHORUS COMPOUND AT A TEMPERATURE BELOW 125*C. FOR A PERIOD BETWEEN ABOUT 2 MINUTES AND 3 HOURS AT WHICH NO SUBSTANTIAL CONVERSION OF SAID ALKYL PHENOL TAKES PLACE RECOVERING THE STARTING ALKYL PHENOL AS STABILIZED PRODUCT.
References Cited (Backward Citations)
US2559594A
Cited
US2223549A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1958-12-19 | 1959-06-20 | 1959-12-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1962-12-19 | 1963-06-20 | 1963-12-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1966-12-19 | 1967-06-20 | 1967-12-20 | $7700.00 | Window Closed / Lapsed |