US2560043A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of reinforcing rubberlike materials
Assignee: Bridgestone Firestone Inc
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Filing: 1947-06-26
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Granted: 1951-07-10
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Expires: 1967-06-26
Abstract
No abstract record available.
Inventors
- 👤 Schmidt Ernst
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 00:41
CPC Classifications
C; C08; C08J; C08J3/00; C08J3/20; C08J3/205; C08J3/21; C08J3/215; C08L; C08L21/00; C08J2321/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
116 words
THE METHOD OF RENFORCING SYNTHETIC RUBBER COMPRISING THE STEPS OF PREPARING AN AQUEOUS SOLUTION OF SODIUM SILICATE, MIXING THE SODIUM SILICATE SOLUTION WITH ACID TO FORM A MIXTURE HAVING A PH OF FROM 7 TO 7.57 OF MONOMERIC SILICIC ACID AND A SODIUM SALT WITH THE MONOMERIC ACID CONDENSING RAPIDLY, IMMEDIATELY MIXING AN AQUSOUS DISPERSION OF RUBBERY COPOLYMER OF BUTADIENE AND STYRENE WITH THE ABOVE MIXTURE WHICH STILL CONTAINS LOW MOLECULAR WEIGHT POLYSILICIC ACID THAT IS IN THE PROCESS OF CONDENSING, LETTING THE RESULTING MIXTURE GEL AND STAND FOR SEVERAL HOURS, BREAKING UP THE BRITTLE, NONRUBBERY GELLED MIXTURE INTO PARTICLES OF MATERIAL, PARTIALLY DRYING THE PARTICLES OF MATERIAL AND MILLING AND COMPOUNDING THE MATERIAL SO OBTAINED.
Claim 2
Independent Claim
116 words
THE METHOD OF RENFORCING SYNTHETIC RUBBER COMPRISING THE STEPS OF PREPARING AN AQUEOUS SOLUTION OF SODIUM SILICATE, MIXING THE SODIUM SILICATE SOLUTION WITH ACID TO FORM A MIXTURE HAVING A PH OF FROM 7 TO 7.57 OF MONOMERIC SILICIC ACID AND A SODIUM SALT WITH THE MONOMERIC ACID CONDENSING RAPIDLY, IMMEDIATELY MIXING AN AQUSOUS DISPERSION OF RUBBERY COPOLYMER OF BUTADIENE AND STYRENE WITH THE ABOVE MIXTURE WHICH STILL CONTAINS LOW MOLECULAR WEIGHT POLYSILICIC ACID THAT IS IN THE PROCESS OF CONDENSING, LETTING THE RESULTING MIXTURE GEL AND STAND FOR SEVERAL HOURS, BREAKING UP THE BRITTLE, NONRUBBERY GELLED MIXTURE INTO PARTICLES OF MATERIAL, PARTIALLY DRYING THE PARTICLES OF MATERIAL AND MILLING AND COMPOUNDING THE MATERIAL SO OBTAINED.
References Cited (Backward Citations)
GB298628A
Cited
US2302833A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1954-07-09 | 1955-01-08 | 1955-07-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-07-09 | 1959-01-08 | 1959-07-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-07-09 | 1963-01-08 | 1963-07-10 | $7700.00 | Window Closed / Lapsed |