Patent US244515A successfully refreshed from Google Patents.
US2968630A
Expired / Lapsed
US
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Rubber antioxidant and method of preparation
Assignee: Wyeth Holdings LLC
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Filing: 1957-12-26
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Granted: 1961-01-17
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Expires: 1977-12-26
Abstract
No abstract record available.
Inventors
- 👤 Dante A Pillon
- 👤 Kaplan Earl
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 20:42
CPC Classifications
C; C08; C08K; C08K5/00; C08K5/16; C08K5/34; C08K5/3442; C08K5/3445; C08K5/04; C08K5/13; C08L; C08L21/00; C08L75/00; C08L75/02
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
6 words
IN PREPARING 2,2''-METHYLENE-BISDIALKYLPHENOL OF THE FORMULA
Claim 2
Dependent Claim
6 words
IN PREPARING 2,2''-METHYLENE-BISDIALKYLPHENOL OF THE FORMULA
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) | 1964-01-17 | 1964-07-18 | 1965-01-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-01-17 | 1968-07-18 | 1969-01-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-01-17 | 1972-07-18 | 1973-01-17 | $7700.00 | Window Closed / Lapsed |