US3019207A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of producing stabilized oil extended butadiene-styrene rubbery copolymer
Assignee: Bridgestone Firestone Inc
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Filing: 1956-05-21
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Granted: 1962-01-30
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Expires: 1976-05-21
Abstract
No abstract record available.
Inventors
- 👤 Crane Grant
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 03:47
CPC Classifications
C; C08; C08K; C08K5/00; C08K5/01; C08K3/00; C08K3/01; C08K3/013
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
107 words
METHOD OF PRODUCING A STABILIZED OIL-EXTENDED BUTADIENE-STYRENE COPOLYMER SYNTHETIC RUBBER CONSISTING ESSENTIALLY IN ADMIXING A FRESHLY POLYMERIZED AQUEOUS DISPERSION OF SAID SYNTHETIC RUBBER WITH 20 TO 100 PHR. OF EXTENDING OIL AND FROM 0.1 TO 5 PHR. OF A FINELY DIVIDED INORGANIC RUBBER PIGMENT SELECTED FROM THE GROUP CONSISTING OF ZINC OXIDE, MAGNESIUM OXIDE, CALCIUM SILICATE AND SILICON DIOXIDE; COAGULATING THE MIXTURE OF PIGMENT AND DISPERSION OF OIL--EXTENDED SYNTHETIC RUBBER; AND DRYING THE RESULTING COAGULUM, WHEREBY AN UNVULCANIZED OILEXTENDED SYNTHETIC RUBBER CONTAINING SUBSTANTIALLY NO SULFUR AND ACCELERATOR IS OBTAINED EXHIBITING IMPROVED STABILITY AGAINST LOSS OF ITS INITIAL MOONEY PLASTICITY VALUE UPON AGING DURING STORAGE FOR SEVERAL MONTHS.
Claim 2
Dependent Claim
107 words
METHOD OF PRODUCING A STABILIZED OIL-EXTENDED BUTADIENE-STYRENE COPOLYMER SYNTHETIC RUBBER CONSISTING ESSENTIALLY IN ADMIXING A FRESHLY POLYMERIZED AQUEOUS DISPERSION OF SAID SYNTHETIC RUBBER WITH 20 TO 100 PHR. OF EXTENDING OIL AND FROM 0.1 TO 5 PHR. OF A FINELY DIVIDED INORGANIC RUBBER PIGMENT SELECTED FROM THE GROUP CONSISTING OF ZINC OXIDE, MAGNESIUM OXIDE, CALCIUM SILICATE AND SILICON DIOXIDE; COAGULATING THE MIXTURE OF PIGMENT AND DISPERSION OF OIL--EXTENDED SYNTHETIC RUBBER; AND DRYING THE RESULTING COAGULUM, WHEREBY AN UNVULCANIZED OILEXTENDED SYNTHETIC RUBBER CONTAINING SUBSTANTIALLY NO SULFUR AND ACCELERATOR IS OBTAINED EXHIBITING IMPROVED STABILITY AGAINST LOSS OF ITS INITIAL MOONEY PLASTICITY VALUE UPON AGING DURING STORAGE FOR SEVERAL MONTHS.
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) | 1965-01-29 | 1965-07-31 | 1966-01-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-01-29 | 1969-07-31 | 1970-01-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-01-29 | 1973-07-31 | 1974-01-30 | $7700.00 | Window Closed / Lapsed |