Patent US2935485A successfully refreshed from Google Patents.
US2935485A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Oil extended rubber compositions stabilized with magnesium salts
Assignee: Shell USA Inc
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Filing: 1956-06-28
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Granted: 1960-05-03
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Expires: 1976-06-28
Abstract
No abstract record available.
Inventors
- 👤 Richard J Reynolds
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 12:24
CPC Classifications
C; C08; C08K; C08K5/00; C08K5/04; C08K5/09; C08K5/098
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
137 words
A RUBBER COMPOSITION INHIBITED AGAINST OXIDATIVE DEGRADATION WHICH COMPRISES A VULCANIZABLE RUBBERY POLYMER OF CONJUGATED DIENE PREPARED AT A LOW TEMPERATURE IN AN AQUEOUS EMULSION AND IN THE PRESENCE OF AN IRON SALT, THE IRON SALT BEING PRESENT IN THE RUBBERY POLYMER IN AN AMOUNT OF FROM 200 TO 1000 PARTS PER MILLION PARTS OF RUBBERY POLYMER, 10 TO 100 PARTS PER 100 PARTS OF RUBBERY POLYMER OF A COMPATIBLE PETROLEUM OIL SOFTENER HAVING A BOILING PONT ABOVE 300* F. AT 10 MM. HG PRESSURE AND VISCOSITY VARYING FROM ABOUT 10 CS. AT 210* F., UP TO SOLID MATERIAL SOFTENING AT ABOUT 100* F. TO 200* F., AND FROM .2 TO 10% OF A MAGNESIUM SALT OF AN ACIDIC MATERIAL OF THE GROUP CONSISTING OF CARBOXYLIC ACIDS CONTAINING FROM 6 TO 25 CARBON ATOMS AND MONOHYDRIC PHENOLS.
Claim 2
Dependent Claim
137 words
A RUBBER COMPOSITION INHIBITED AGAINST OXIDATIVE DEGRADATION WHICH COMPRISES A VULCANIZABLE RUBBERY POLYMER OF CONJUGATED DIENE PREPARED AT A LOW TEMPERATURE IN AN AQUEOUS EMULSION AND IN THE PRESENCE OF AN IRON SALT, THE IRON SALT BEING PRESENT IN THE RUBBERY POLYMER IN AN AMOUNT OF FROM 200 TO 1000 PARTS PER MILLION PARTS OF RUBBERY POLYMER, 10 TO 100 PARTS PER 100 PARTS OF RUBBERY POLYMER OF A COMPATIBLE PETROLEUM OIL SOFTENER HAVING A BOILING PONT ABOVE 300* F. AT 10 MM. HG PRESSURE AND VISCOSITY VARYING FROM ABOUT 10 CS. AT 210* F., UP TO SOLID MATERIAL SOFTENING AT ABOUT 100* F. TO 200* F., AND FROM .2 TO 10% OF A MAGNESIUM SALT OF AN ACIDIC MATERIAL OF THE GROUP CONSISTING OF CARBOXYLIC ACIDS CONTAINING FROM 6 TO 25 CARBON ATOMS AND MONOHYDRIC PHENOLS.
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) | 1963-05-03 | 1963-11-02 | 1964-05-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-05-03 | 1967-11-02 | 1968-05-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-05-03 | 1971-11-02 | 1972-05-03 | $7700.00 | Window Closed / Lapsed |