US2964457A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Silica reinforced rubber
Assignee: Phillips Petroleum Co
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Filing: 1957-06-28
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Granted: 1960-12-13
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Expires: 1977-06-28
Abstract
No abstract record available.
Inventors
- 👤 Kraus Gerard
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 08:33
CPC Classifications
B; B29; B29C; B29C71/00; B29C71/04; B29C35/00; B29C35/02; B29C35/08; B29C35/0805; B29C2035/0844; B29C2035/085; B29C35/0866; B29C2035/0872; B29C2035/0877; B29K; B29K2021/00; Y; Y10; Y10S; Y10S159/00; Y10S159/20
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
118 words
AN IMPROVED CURED RUBBER STOCK CONSISTING ESSENTIALLY OF AN IRRADIATED BLEND OF 100 PARTS BY WEIGHT OF GUM RUBBER SELECTED FROM THE GROUP CONSISTING OF NATURAL RUBBER, SYNTHETIC ELASTOMERS FORMED AS HOMOPOLYMERS OF CONJUGATED DIENES HAVING FROM 4 TO 8 CARBON ATOMS PER MOLECULE, AND COPOLYMERS HAVING A MAJOR AMOUNT OF CONJUGATED DIENE AND MINOR AMOUNT OF COPOLYMERIZABLE MONOMER CONTAING THE CH2-C< GROUP AND FROM 20 TO 150 PARTS BY WEIGHT OF COLLOIDAL SILICA, SAID BLEND HAVING BEEN IRRADIATED BY EXPOSURE TO HIGH ENERGY IONIZING RADIATION HAVING ENERGY AT LEAST EQUIVALENT TO X-RAYS AT A DOSE RATE OF FROM ABOUT 103 TO 3X10**7 REP PER HOUR AND FROM A TOTAL DOSAGE OF FROM ABOUT 10**6 TO 5X10**8 REP.
Claim 2
Dependent Claim
118 words
AN IMPROVED CURED RUBBER STOCK CONSISTING ESSENTIALLY OF AN IRRADIATED BLEND OF 100 PARTS BY WEIGHT OF GUM RUBBER SELECTED FROM THE GROUP CONSISTING OF NATURAL RUBBER, SYNTHETIC ELASTOMERS FORMED AS HOMOPOLYMERS OF CONJUGATED DIENES HAVING FROM 4 TO 8 CARBON ATOMS PER MOLECULE, AND COPOLYMERS HAVING A MAJOR AMOUNT OF CONJUGATED DIENE AND MINOR AMOUNT OF COPOLYMERIZABLE MONOMER CONTAING THE CH2-C< GROUP AND FROM 20 TO 150 PARTS BY WEIGHT OF COLLOIDAL SILICA, SAID BLEND HAVING BEEN IRRADIATED BY EXPOSURE TO HIGH ENERGY IONIZING RADIATION HAVING ENERGY AT LEAST EQUIVALENT TO X-RAYS AT A DOSE RATE OF FROM ABOUT 103 TO 3X10**7 REP PER HOUR AND FROM A TOTAL DOSAGE OF FROM ABOUT 10**6 TO 5X10**8 REP.
Claim 3
Independent Claim
95 words
A METHOD OF PREPARING AN IMPROVED CURED RUBBER STOCK WHICH COMPRISES BLENDING A RAW, UNCURED GUM SELECTED FROM THE GROUP CONSISTING OF NATURAL RUBBER, SYNTHETIC ELASTOMERS FORMED AS HOMOPOLYMERS OF CONJUGATED DIENES HAVING FROM 4 TO 8 CARBON ATOMS PER MOLECULE, AND COPOLYMERS HAVING A MAJOR AMOUNT OF CONJUGATED DIENE AND MINOR AMOUNT OF COPOLYMERIZABLE MONOMER CONTAINING THE CH2=C< GROUP WITH A REINFORCING AMOUNT OF COLLOIDAL SILICA, AND CURING THE RESULANT BLEND IN THE ABSENCE OF SULFUR CURATIVE BY EXPOSURE TO A VULCANIZING AMOUNT OF IONIZING RADIATION HAVING ENERGY AT LEAST EQUIVALENT TO X RAYS.
Claim 4
Independent Claim
95 words
A METHOD OF PREPARING AN IMPROVED CURED RUBBER STOCK WHICH COMPRISES BLENDING A RAW, UNCURED GUM SELECTED FROM THE GROUP CONSISTING OF NATURAL RUBBER, SYNTHETIC ELASTOMERS FORMED AS HOMOPOLYMERS OF CONJUGATED DIENES HAVING FROM 4 TO 8 CARBON ATOMS PER MOLECULE, AND COPOLYMERS HAVING A MAJOR AMOUNT OF CONJUGATED DIENE AND MINOR AMOUNT OF COPOLYMERIZABLE MONOMER CONTAINING THE CH2=C< GROUP WITH A REINFORCING AMOUNT OF COLLOIDAL SILICA, AND CURING THE RESULANT BLEND IN THE ABSENCE OF SULFUR CURATIVE BY EXPOSURE TO A VULCANIZING AMOUNT OF IONIZING RADIATION HAVING ENERGY AT LEAST EQUIVALENT TO X RAYS.
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) | 1963-12-13 | 1964-06-13 | 1964-12-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-12-13 | 1968-06-13 | 1968-12-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-12-13 | 1972-06-13 | 1972-12-13 | $7700.00 | Window Closed / Lapsed |