Patent US3632725A successfully refreshed from Google Patents.
US3632725A
Expired / Lapsed
US
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Method of facing masonry blocks
Assignee: Burns and Russell Co
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Filing: 1970-02-04
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Granted: 1972-01-04
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Expires: 1990-02-04
Abstract
Abstract A METHOD FOR FACING A MASONRY BUILDING BLOCK CONSISTING OF ADDING CONSECUTIVELY TO AN APPROPRIATE MOLD A THIN COATING OF SURFACE MATERIAL COMPRISING A THICKENED MIXTURE OF AN ETHYLENICALLY UNSATURATED POLVESTER RESIN AND A POLYMERIZABLE MONOMER, AN APPROXIMATELY SINGLEGRAIN LAYER OF SAND, A SECOND THIN COATING OF SURFACE MATERIAL, A SLURRY COMPRISING AN ETHYLENICALLY UNSATURATED POLYESTER RESIN AND A POLYMERIZABLE VINYL MONOMER INTO WHICH HAS BEEN INCORPORATED A MAJOR PROPORTION BY WEIGHT OF SAND, AND A MASONRY BLOCK; AND SIMULTANEOUSLY CURING THE FACING RESINS WHILE THE ABOVE MATERIALS ARE THUS ASSEMBLED.
Inventors
- 👤 James F Jones
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 12:18
CPC Classifications
B; B28; B28B; B28B11/00; B28B11/04; Y; Y10; Y10T; Y10T428/00; Y10T428/249921; Y10T428/249953; Y10T428/249955; Y10T428/249958; Y10T428/249967; Y10T428/249968; Y10T428/249994; Y10T428/249999; Y10T428/25; Y10T428/259
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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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) | 1975-01-03 | 1975-07-05 | 1976-01-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-01-03 | 1979-07-05 | 1980-01-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-01-03 | 1983-07-05 | 1984-01-04 | $7700.00 | Window Closed / Lapsed |