US2591149A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of coating mineral granules
Assignee: Central Commercial Co
•
Filing: 1948-04-21
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Granted: 1952-04-01
•
Expires: 1968-04-21
Abstract
No abstract record available.
Inventors
- 👤 Grove Clinton
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 10:46
CPC Classifications
E; E04; E04D; E04D7/00; E04D7/005
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
171 words
THE METHOD OF TREATING MINERAL GRANULES TO FORM ON EACH INDIVIDUAL GRANULE AN INSOLUBLE COLOR-BEARING COATING WHICH IS CHARACTERIZED BY ITS AFFINITY FOR ASPHALT AND POSSESSES NON-BLOOMING PROPERTIES, WHICH METHOD COMPRISES COMPLETELY COATING EACH INDIVIDUAL GRANULE WITH AN AQUEOUS DISPERSION OF SODIUM SILICATE, PIGMENTING MATERIAL AND ALUMINUM FLUORIDE, THE ALUMINUM FLUORIDE BEING PRESENT IN AN AMOUNT SUFFICIENT TO PARTIALLY REACT WITH SAID SODIUM SILICATE AT TEMPERATURES RANGING FROM 450* F. TO 650* F., HEATING THE COATED GRANULES TO THE TEMPERATURES AFORESAID TO PARTIALLY REACT THE ALUMINUM FLUORIDE WITH THE SODIUM SILICATE, WHEREBY THE SODIUM SILICATE GELS TO A FILM WHICH RESISTS ABRASION AND RETAINS THE PIGMENTING MATERIAL ON THE GRANULES, COOLING THE COATED GRANULES TO A TEMPERATURE APPROXIMATELY 200* F., APPLYING TO THE TREATED GRANULES WHILE THEY ARE AT THE LATTER TEMPERATURE AN AQUEOUS SOLUTION OF AN ISOLUBILIZING AGENT SELECTED FROM THE GROUP CONSISTING OF ALUMINUM CHLORIDE ALUMINUM NITRATE, FERRIC CHLORIDE AND MAGNESIUM CHLORIDE TO COMPLETELY INSOLUBILIZE THE SODIUM SILICATE, AND AERATING THE GRANULES SO TREATED TO EVAPORATE THE WATER THEREFROM.
Claim 2
Independent Claim
171 words
THE METHOD OF TREATING MINERAL GRANULES TO FORM ON EACH INDIVIDUAL GRANULE AN INSOLUBLE COLOR-BEARING COATING WHICH IS CHARACTERIZED BY ITS AFFINITY FOR ASPHALT AND POSSESSES NON-BLOOMING PROPERTIES, WHICH METHOD COMPRISES COMPLETELY COATING EACH INDIVIDUAL GRANULE WITH AN AQUEOUS DISPERSION OF SODIUM SILICATE, PIGMENTING MATERIAL AND ALUMINUM FLUORIDE, THE ALUMINUM FLUORIDE BEING PRESENT IN AN AMOUNT SUFFICIENT TO PARTIALLY REACT WITH SAID SODIUM SILICATE AT TEMPERATURES RANGING FROM 450* F. TO 650* F., HEATING THE COATED GRANULES TO THE TEMPERATURES AFORESAID TO PARTIALLY REACT THE ALUMINUM FLUORIDE WITH THE SODIUM SILICATE, WHEREBY THE SODIUM SILICATE GELS TO A FILM WHICH RESISTS ABRASION AND RETAINS THE PIGMENTING MATERIAL ON THE GRANULES, COOLING THE COATED GRANULES TO A TEMPERATURE APPROXIMATELY 200* F., APPLYING TO THE TREATED GRANULES WHILE THEY ARE AT THE LATTER TEMPERATURE AN AQUEOUS SOLUTION OF AN ISOLUBILIZING AGENT SELECTED FROM THE GROUP CONSISTING OF ALUMINUM CHLORIDE ALUMINUM NITRATE, FERRIC CHLORIDE AND MAGNESIUM CHLORIDE TO COMPLETELY INSOLUBILIZE THE SODIUM SILICATE, AND AERATING THE GRANULES SO TREATED TO EVAPORATE THE WATER THEREFROM.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1955-04-01 | 1955-10-01 | 1956-04-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-04-01 | 1959-10-01 | 1960-04-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-04-01 | 1963-10-01 | 1964-04-01 | $7700.00 | Window Closed / Lapsed |