Patent US2903487A successfully refreshed from Google Patents.
US2903487A
Expired / Lapsed
US
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Metallic derivatives of hindered phenols
Assignee: Ethyl Corp
•
Filing: 1955-09-23
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Granted: 1959-09-08
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Expires: 1975-09-23
Abstract
No abstract record available.
Inventors
- 👤 Thomas H Coffield
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 18:11
CPC Classifications
C; C07; C07C; C07C37/00; C07C37/64; C07C37/66; C07C39/00; C07C39/235
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
26 words
AS A NEW COMPOSITION OF MATTER, A COMPOUND CONSISTING OF A METALLIC CATION AND AN ANION DERIVED FROM A 2,6-DI-ALKYL PHENOL, SAID PHENOL HAVING THE FORMULA
Claim 2
Dependent Claim
26 words
AS A NEW COMPOSITION OF MATTER, A COMPOUND CONSISTING OF A METALLIC CATION AND AN ANION DERIVED FROM A 2,6-DI-ALKYL PHENOL, SAID PHENOL HAVING THE FORMULA
References Cited (Backward Citations)
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-09-07 | 1963-03-09 | 1963-09-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-09-07 | 1967-03-09 | 1967-09-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-09-07 | 1971-03-09 | 1971-09-08 | $7700.00 | Window Closed / Lapsed |