US2921919A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Rubberized mineral-tar composition and process of making same
Assignee: Goodyear Tire and Rubber Co
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Filing: 1955-11-16
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Granted: 1960-01-19
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Expires: 1975-11-16
Abstract
No abstract record available.
Inventors
- 👤 Herbert A Endres
- 👤 Walter F Winters
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 23:15
CPC Classifications
C; C08; C08L; C08L95/00; Y; Y10; Y10S; Y10S524/00; Y10S524/925
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
186 words
A METHOD OF PRODUCING A SUBSTANTIALLY ANHYDROUS RUBBERIZED MINERAL-TAR COMPOSITION SUITABLE FOR USE AS A MATERIAL FOR SURFACING AREAS SUBJECTED TO SOLVENT ACTION OF LIQUID HYDROCARBONS WHICH COMPRISES THOROUGHLY INTERMIXING A LATEX OF AN UNVULCANIZED DIENE POLYMER RUBBER AND A MINERAL FILLER, ALL PARTICLES OF SAID FILLER BEING OF A SIZE TO PASS A 200-MESH STANDARD SIEVE, IN SUCH PROPORTIONS THAT THE SOLIDS CONTENT OF THE MIXTURE CONSISTS ESSENTIALLY OF 10 TO 40 PERCENT BY WEIGHT OF RUBBER AND FROM 90 TO 60 PERCENT BY WEIGHT OF MINERAL FILLER, COAGULATING THE RUBBER IN SAID MIXTURE TO FORM RUBBERIZED MINERAL PARTICLES, DEWATERING, DRYING AND PULVERIZING THE RESULTING RUBBERIZED MINERAL PARTICLES TO FORM A SUBSTANTIALLY ANHYDROUS, STORAGE-STABLE, FREE-FLOWING POWDER CAPABLE OF PASSING A 60-MESH STANDARD SCREEN, MIXING 5% TO 40% BY WEIGHT OF SAID POWDER WITH A TAR HAVING A 300*C. DISTILLATION RESIDUE SOFTENING POINT OF BETWEEN ABOUT 25* AND 75*C. AND IN SUCH PROPORTION THAT THE AMOUNT OF RUBBER IN THE RESULTING RUBBERIZED MINERAL-TAR COMPOSITION IS BETWEEN ABOUT 1% AND 5% BY WEIGHT OF SAID COMPOSITION, AND CONTINUING SAID MIXING UNTIL A HOMOGENEOUS SURFACING COMPOSITION IS FORMED.
Claim 2
Independent Claim
186 words
A METHOD OF PRODUCING A SUBSTANTIALLY ANHYDROUS RUBBERIZED MINERAL-TAR COMPOSITION SUITABLE FOR USE AS A MATERIAL FOR SURFACING AREAS SUBJECTED TO SOLVENT ACTION OF LIQUID HYDROCARBONS WHICH COMPRISES THOROUGHLY INTERMIXING A LATEX OF AN UNVULCANIZED DIENE POLYMER RUBBER AND A MINERAL FILLER, ALL PARTICLES OF SAID FILLER BEING OF A SIZE TO PASS A 200-MESH STANDARD SIEVE, IN SUCH PROPORTIONS THAT THE SOLIDS CONTENT OF THE MIXTURE CONSISTS ESSENTIALLY OF 10 TO 40 PERCENT BY WEIGHT OF RUBBER AND FROM 90 TO 60 PERCENT BY WEIGHT OF MINERAL FILLER, COAGULATING THE RUBBER IN SAID MIXTURE TO FORM RUBBERIZED MINERAL PARTICLES, DEWATERING, DRYING AND PULVERIZING THE RESULTING RUBBERIZED MINERAL PARTICLES TO FORM A SUBSTANTIALLY ANHYDROUS, STORAGE-STABLE, FREE-FLOWING POWDER CAPABLE OF PASSING A 60-MESH STANDARD SCREEN, MIXING 5% TO 40% BY WEIGHT OF SAID POWDER WITH A TAR HAVING A 300*C. DISTILLATION RESIDUE SOFTENING POINT OF BETWEEN ABOUT 25* AND 75*C. AND IN SUCH PROPORTION THAT THE AMOUNT OF RUBBER IN THE RESULTING RUBBERIZED MINERAL-TAR COMPOSITION IS BETWEEN ABOUT 1% AND 5% BY WEIGHT OF SAID COMPOSITION, AND CONTINUING SAID MIXING UNTIL A HOMOGENEOUS SURFACING COMPOSITION IS FORMED.
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) | 1963-01-18 | 1963-07-20 | 1964-01-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-01-18 | 1967-07-20 | 1968-01-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-01-18 | 1971-07-20 | 1972-01-19 | $7700.00 | Window Closed / Lapsed |