US3345323A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Rubber composition and method of preparation
Assignee: Goodyear Tire and Rubber Co
•
Filing: 1963-02-21
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Granted: 1967-10-03
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Expires: 1983-02-21
Abstract
No abstract record available.
Inventors
- 👤 Herbert A Endres
- 👤 Kenneth E Bristol
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 07:34
CPC Classifications
C; C08; C08J; C08J3/00; C08J3/20; C08J3/205; C08J3/21; C08J3/212; B; B01; B01F; B01F25/00; B01F25/50; C08J2321/00; Y; Y10; Y10S; Y10S524/00; Y10S524/925
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
136 words
A METHOD FOR PRODUCING A POWDERY UNVULCANIZED RUBBER COMPOSITON WHICH CONSISTS ESENTGIALLY OF THE STEPS OF (1) CONTROLLABLY ADDING A LATEX HAVING A RUBBERY CONTENT OF AT LEAST ABOUT 35% BY WEIGHT TO AN INORGANIC POWDERY MATERIAL HAVING A WATER ABSORBENCY OF AT LEAST ONE GRAM PER GRAM; (2) MIXING THE POWDERY MATERIAL IN CONTACT WITH THE LATEX WITH MORE POWDERY MATERIAL TO MAINTAIN THE FREE-FLOWING POWDERY NATURE THROUGHOUT THE MIXTURE; (3) CONTINUING THIS CONTROLLED ADDITION AND MIXING UNTIL THE AMOUNT OF LATEX ABSORBED ON ALL THE POWDERY MATERIAL IS SUFFICIENT TO YIELD A LOOSE, MEALY POWDER CONTAINING AT LEAST 60% BY WEIGHT OF RUBBER BUT INSUFFICIENT TO YIELD A PASTY ADHERING MASS, AND (4) THEN REMOVING THE ABSORBED WATER TO OBTAIN THE MIXTURE AS A DRY POWDER CONTAINING AT LEAST 60% BY WEIGHT OF RUBBER.
Claim 2
Independent Claim
136 words
A METHOD FOR PRODUCING A POWDERY UNVULCANIZED RUBBER COMPOSITON WHICH CONSISTS ESENTGIALLY OF THE STEPS OF (1) CONTROLLABLY ADDING A LATEX HAVING A RUBBERY CONTENT OF AT LEAST ABOUT 35% BY WEIGHT TO AN INORGANIC POWDERY MATERIAL HAVING A WATER ABSORBENCY OF AT LEAST ONE GRAM PER GRAM; (2) MIXING THE POWDERY MATERIAL IN CONTACT WITH THE LATEX WITH MORE POWDERY MATERIAL TO MAINTAIN THE FREE-FLOWING POWDERY NATURE THROUGHOUT THE MIXTURE; (3) CONTINUING THIS CONTROLLED ADDITION AND MIXING UNTIL THE AMOUNT OF LATEX ABSORBED ON ALL THE POWDERY MATERIAL IS SUFFICIENT TO YIELD A LOOSE, MEALY POWDER CONTAINING AT LEAST 60% BY WEIGHT OF RUBBER BUT INSUFFICIENT TO YIELD A PASTY ADHERING MASS, AND (4) THEN REMOVING THE ABSORBED WATER TO OBTAIN THE MIXTURE AS A DRY POWDER CONTAINING AT LEAST 60% BY WEIGHT OF RUBBER.
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) | 1970-10-02 | 1971-04-03 | 1971-10-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-10-02 | 1975-04-03 | 1975-10-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-10-02 | 1979-04-03 | 1979-10-03 | $7700.00 | Window Closed / Lapsed |