Patent US2574078A successfully refreshed from Google Patents.
US2574078A
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Hydrogenated polyalkylated phenols
Assignee: Gulf Research and Development Co
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Filing: 1949-02-24
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Granted: 1951-11-06
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Expires: 1969-02-24
Abstract
No abstract record available.
Inventors
- 👤 Arthur C Whitaker
- 👤 William W Weinrich
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 18:14
CPC Classifications
C; C07; C07C; C07C49/00; C07C49/385; C07C49/403; C07C35/00; C07C35/02; C07C35/08; C07C45/00; C07C45/006; C07C2601/00; C07C2601/12; C07C2601/14; C07C2601/16
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
15 words
AN EQUILIBRIUM MIXTURE OF ENOL AND KETO FORMS OF COMPOUNDS HAVING THE FOLLOWING STRUCTURAL FORMULAS:
Claim 2
Dependent Claim
15 words
AN EQUILIBRIUM MIXTURE OF ENOL AND KETO FORMS OF COMPOUNDS HAVING THE FOLLOWING STRUCTURAL FORMULAS:
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) | 1954-11-05 | 1955-05-07 | 1955-11-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-11-05 | 1959-05-07 | 1959-11-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-11-05 | 1963-05-07 | 1963-11-06 | $7700.00 | Window Closed / Lapsed |