US3018254A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Rubber antioxidant dispersions
Assignee: Wyeth Holdings LLC
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Filing: 1957-12-26
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Granted: 1962-01-23
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Expires: 1977-12-26
Abstract
No abstract record available.
Inventors
- 👤 Kaplan Earl
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 07:20
CPC Classifications
C; C08; C08K; C08K5/00; C08K5/04; C08K5/13; C08K5/16; C08K5/34; C08K5/3442; C08K5/3445; C08L; C08L21/00; C08L21/02
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
115 words
A FLUID, HIGH-SOLIDS CONTENT DISPERSION OF A 2,2''METHYLENE-BIS (4-ALKYL-6-T-ALKYL PHENOL) IN WHICH THE ALKYL AND T-ALKYL MOIETIES CONTAIN 1-3 CARBONS AND 4-8 CARBONS RESPECTIVELY, IN AN ESSENTIALLY AQUEOUS MEDIUM, SAID DISPERSION HAVING INCORPORATED THEREIN FROM ABOUT 0.5 TO ABOUT 5.0 WEIGHT PERCENT OF THE WEIGHT OF SAID BISDIALKYL PHENOL OF AN AGENT SELECTED FROM THE GROUP CONSISTING OF THE SELF-CONDENSATION PRODUCTS OF DIMETHYLOLETHYLENEUREA HAVING A MOLECULAR WEIGHT OF FROM ABOUT 200 TO ABOUT 400 AND OF POLYVINYLPYRROLIDONE HAVING A MOLECULAR WEIGHT OF FROM ABOUT 20,000 TO ABOUT 40,000 AND SAID DISPERSION BEING FURTHER CHARACTERIZED BY REMAINING FLUID FOR AN EXTENDED PERIOD OF TIME, AT A SOLIDS CONTENT OF FIFTY WEIGHT PERCENT OF SAID BIS-DIALKYL PHENOL.
Claim 2
Dependent Claim
115 words
A FLUID, HIGH-SOLIDS CONTENT DISPERSION OF A 2,2''METHYLENE-BIS (4-ALKYL-6-T-ALKYL PHENOL) IN WHICH THE ALKYL AND T-ALKYL MOIETIES CONTAIN 1-3 CARBONS AND 4-8 CARBONS RESPECTIVELY, IN AN ESSENTIALLY AQUEOUS MEDIUM, SAID DISPERSION HAVING INCORPORATED THEREIN FROM ABOUT 0.5 TO ABOUT 5.0 WEIGHT PERCENT OF THE WEIGHT OF SAID BISDIALKYL PHENOL OF AN AGENT SELECTED FROM THE GROUP CONSISTING OF THE SELF-CONDENSATION PRODUCTS OF DIMETHYLOLETHYLENEUREA HAVING A MOLECULAR WEIGHT OF FROM ABOUT 200 TO ABOUT 400 AND OF POLYVINYLPYRROLIDONE HAVING A MOLECULAR WEIGHT OF FROM ABOUT 20,000 TO ABOUT 40,000 AND SAID DISPERSION BEING FURTHER CHARACTERIZED BY REMAINING FLUID FOR AN EXTENDED PERIOD OF TIME, AT A SOLIDS CONTENT OF FIFTY WEIGHT PERCENT OF SAID BIS-DIALKYL PHENOL.
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) | 1965-01-22 | 1965-07-24 | 1966-01-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-01-22 | 1969-07-24 | 1970-01-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-01-22 | 1973-07-24 | 1974-01-23 | $7700.00 | Window Closed / Lapsed |