US2877273A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Improving color stability of alkyl phenols
Assignee: Hercules Powder Co
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Filing: 1957-07-22
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Granted: 1959-03-10
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Expires: 1977-07-22
Abstract
No abstract record available.
Inventors
- 👤 Jr Herman I Enos
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 16:08
CPC Classifications
C; C07; C07C; C07C37/00; C07C37/68; C07C37/88
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
64 words
THE PROCESS FOR IMPROVING THE COLOR STABILITY OF AN ALKYL PHENOL WHICH TENDS TO DISCOLOR ON AGING WHICH COMPRISES TREATING SAID ALKYL PHENOL AT A TEMPERATURE WITHIN THE RANGE OF ABOUT 0* C. TO 125* C. WITH A MINOR AMOUNT WITHIN THE RANGE OF ABOUT 0.01 TO 5%, BASED ON THE WEIGHT OF THE SAID ALKYL PHENOL, OF AN ABIETYLAMINE DERIVATIVE HAVING THE FORMULA:
Claim 2
Dependent Claim
64 words
THE PROCESS FOR IMPROVING THE COLOR STABILITY OF AN ALKYL PHENOL WHICH TENDS TO DISCOLOR ON AGING WHICH COMPRISES TREATING SAID ALKYL PHENOL AT A TEMPERATURE WITHIN THE RANGE OF ABOUT 0* C. TO 125* C. WITH A MINOR AMOUNT WITHIN THE RANGE OF ABOUT 0.01 TO 5%, BASED ON THE WEIGHT OF THE SAID ALKYL PHENOL, OF AN ABIETYLAMINE DERIVATIVE HAVING THE FORMULA:
References Cited (Backward Citations)
US2570403A
Cited
US2808375A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-03-09 | 1962-09-08 | 1963-03-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-03-09 | 1966-09-08 | 1967-03-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-03-09 | 1970-09-08 | 1971-03-10 | $7700.00 | Window Closed / Lapsed |