US3752696A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Colored roofing granules
Assignee: GAF Corp
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Filing: 1967-02-17
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Granted: 1973-08-14
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Expires: 1987-02-17
Abstract
Abstract BARIUM FLUOSILICATE AND OTHER METAL FLUOSLICATES ENCAPSULATED BY A POLYMERIC COMPOSITION SUCH AS POLYVINYL CHLORIDE, THAT IS SUBSTANTIALLY INSOLUBLE IN WATERR AND ALKALI SILICATE AT A TEMPERATURE BELOW ABOUT 100*F., BUT IS CAPABLE OF DISSOLVING IN HOT ALKALI SILICATE BINDER, IS USED AS A LATENT REACTANT IN THE PROCESS FOR MANUFACTURING ARTIFICIALLY COLORED ROOFING GRANULES. THE LATENT REACTANT IS SUSPENDED IN A PIGMENTED AQUEOUS SILICATE SLURRY WHICH IS USED TO COAT MINERAL GRANULES. THE COATED GRANULES ARE HEATED TO ABOUT 200*F. TO CAUSE INSOLUBILIZATION OF THE SILICATE BY THE CHEMICAL ACTION OF THE FLUOSILICATE.
Inventors
- 👤 R Beyard
- 👤 J Horai
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 18:42
CPC Classifications
B; B05; B05D; B05D7/00; Y; Y10; Y10T; Y10T428/00; Y10T428/29; Y10T428/2982; Y10T428/2991; Y10T428/2998
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-08-13 | 1977-02-12 | 1977-08-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-08-13 | 1981-02-12 | 1981-08-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-08-13 | 1985-02-12 | 1985-08-14 | $7700.00 | Window Closed / Lapsed |