US2526504A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process of increasing bruise-resistance of low-unsaturation isobutylene-diolefin synthetic rubber before curing
Assignee: Standard Oil Development Co
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Filing: 1946-04-11
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Granted: 1950-10-17
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Expires: 1966-04-11
Abstract
No abstract record available.
Inventors
- 👤 Jr John Rehner
- 👤 Paul J Flory
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 18:20
CPC Classifications
C; C08; C08K; C08K5/00; C08K5/16; C08K5/32
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
88 words
A POLYMER COMPOSITION HAVING HIGH BRUISE, FOLD AND CLAMP DAMAGE RESISTANCE COMPRISING AN INTERPOLYMER OF ISOBUTYLENE IN MAJOR PROPORTION WITH A MULTI-OLEFINIC UNSATURATE HAVING FROM 4 TO 14 CARBON ATOMS PER MOLECULE IN MINOR PROPORTION HAVING A STAUDINGER MOLECULAR WEIGHT NUMBER WITHIN THE RANGE BETWEEN 30,000 AND 80,000, TOGETHER WITH CURING AGENTS AND PIGMENTS AND FROM 0.0008 TO 0.1% OF AN AROMATIC DINITROSO COMPOUND THE SAID COMPOUND BEING CHARACTERIZED BY AN UNCURED CONDITION, THERMOPLASTICITY, THE CAPABILITY OF CURING WITH SURFUR AND FREEDOM FROM COLD FLOW AT ROOM TEMPERATURE.
Claim 2
Dependent Claim
88 words
A POLYMER COMPOSITION HAVING HIGH BRUISE, FOLD AND CLAMP DAMAGE RESISTANCE COMPRISING AN INTERPOLYMER OF ISOBUTYLENE IN MAJOR PROPORTION WITH A MULTI-OLEFINIC UNSATURATE HAVING FROM 4 TO 14 CARBON ATOMS PER MOLECULE IN MINOR PROPORTION HAVING A STAUDINGER MOLECULAR WEIGHT NUMBER WITHIN THE RANGE BETWEEN 30,000 AND 80,000, TOGETHER WITH CURING AGENTS AND PIGMENTS AND FROM 0.0008 TO 0.1% OF AN AROMATIC DINITROSO COMPOUND THE SAID COMPOUND BEING CHARACTERIZED BY AN UNCURED CONDITION, THERMOPLASTICITY, THE CAPABILITY OF CURING WITH SURFUR AND FREEDOM FROM COLD FLOW AT ROOM TEMPERATURE.
Claim 3
Dependent Claim
112 words
IN A PROCESS FOR THE PREPARATION OF INNER TUBES FROM A LOW TEMPERTURE POLYMER PREPARED BY THE STEPS OF POLYMERIZING A MAJOR PROPORTION OF ISOBUTYLENE WITH A MINOR PROPORTION OF A MULTIOLEFIN HAVING FROM 4 TO 14 CARBON ATOMS AT A TEMPERATURE WITHIN THE RANGE BETWEEN -40*C. AND -130*C. BY THE APPLICATION OF A DISSOLVED FRIEDELCRAFTS CATALYST, COMPRISING THE STEPS OF MILLING THE POLYMER, MILLING INTO THE POLYMER PIGMENTS TO GOOD DISPERSION, MILLING INTO THE POLYMER FROM 0.0008 TO 0.1% OF AN AROMATIC DINITROSO COMPOUND AT A TEMPERATURE BETWEEN 240*F. AND 320*F.THEN COOLING THE MILL AND MILLING INTO THE POLYMER APPROPRIATE CURING AGENTS AND THEREAFTER SHAPING THE MATERIAL INTO INNER TUBE FORM.
Claim 4
Dependent Claim
112 words
IN A PROCESS FOR THE PREPARATION OF INNER TUBES FROM A LOW TEMPERTURE POLYMER PREPARED BY THE STEPS OF POLYMERIZING A MAJOR PROPORTION OF ISOBUTYLENE WITH A MINOR PROPORTION OF A MULTIOLEFIN HAVING FROM 4 TO 14 CARBON ATOMS AT A TEMPERATURE WITHIN THE RANGE BETWEEN -40*C. AND -130*C. BY THE APPLICATION OF A DISSOLVED FRIEDELCRAFTS CATALYST, COMPRISING THE STEPS OF MILLING THE POLYMER, MILLING INTO THE POLYMER PIGMENTS TO GOOD DISPERSION, MILLING INTO THE POLYMER FROM 0.0008 TO 0.1% OF AN AROMATIC DINITROSO COMPOUND AT A TEMPERATURE BETWEEN 240*F. AND 320*F.THEN COOLING THE MILL AND MILLING INTO THE POLYMER APPROPRIATE CURING AGENTS AND THEREAFTER SHAPING THE MATERIAL INTO INNER TUBE FORM.
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) | 1953-10-16 | 1954-04-17 | 1954-10-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-10-16 | 1958-04-17 | 1958-10-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-10-16 | 1962-04-17 | 1962-10-17 | $7700.00 | Window Closed / Lapsed |