US2902739A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Methods of changing or altering the color of building bricks, tile, or other ceramic units
Assignee: Individual
•
Filing: 1957-07-19
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Granted: 1959-09-08
•
Expires: 1977-07-19
Abstract
No abstract record available.
Inventors
- 👤 Harley B Foster
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 22:11
CPC Classifications
C; C04; C04B; C04B33/00; C04B33/02; C04B33/13; C04B33/14
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
139 words
A METHOD OF IMPARTING A SUBSTANTIALLY PERMANENT COLORATION TO THE SURFACES OF BUILDING BRICKS, TILES AND OTHER CERAMIC UNITS FORMED FROM IRON-BEARING RED-BURING CLAYS OR SHALES, WHICH COMPRISES APPLYING TO A BRICK OR OTHER UNIT, BEFORE FIRING A COATING COMPRISED OF A LIQUID CARRIER VEHICLE, A METALLIC COMPOUND WHICH NEUTRALIZES THE COLORING POWER OF THE IRON BY COMBINING AT HIGH TEMPERATURES WITH THE IRON PRESENT IN THE SURFACE LAYERS OF THE BRICK TO FORM CRYSTALS LIGHTER IN COLOR THAN THE NORMAL RED-BURNING CLAY FROM WHICH THE BRICK IS FORMED, AND A RELAVIVELY SMALL QUANTITY OF A COLORANT HAVING THE PROPERTY OF ALTERING THE COLOR OF THE NEWLY FORMED CRYSTALS OF ALTERING SURFACE LAYERS OF THE BRICK BY DISPERSION THROUGHOUT THE CRYSTALS, WHEREBY TO PRODUCE A DESIRED COLOR, AND THEN FIRING THE COATED BRICK IN ACCORDANCE WITH CUSTOMARY FIRING PROCEDURES.
Claim 2
Independent Claim
139 words
A METHOD OF IMPARTING A SUBSTANTIALLY PERMANENT COLORATION TO THE SURFACES OF BUILDING BRICKS, TILES AND OTHER CERAMIC UNITS FORMED FROM IRON-BEARING RED-BURING CLAYS OR SHALES, WHICH COMPRISES APPLYING TO A BRICK OR OTHER UNIT, BEFORE FIRING A COATING COMPRISED OF A LIQUID CARRIER VEHICLE, A METALLIC COMPOUND WHICH NEUTRALIZES THE COLORING POWER OF THE IRON BY COMBINING AT HIGH TEMPERATURES WITH THE IRON PRESENT IN THE SURFACE LAYERS OF THE BRICK TO FORM CRYSTALS LIGHTER IN COLOR THAN THE NORMAL RED-BURNING CLAY FROM WHICH THE BRICK IS FORMED, AND A RELAVIVELY SMALL QUANTITY OF A COLORANT HAVING THE PROPERTY OF ALTERING THE COLOR OF THE NEWLY FORMED CRYSTALS OF ALTERING SURFACE LAYERS OF THE BRICK BY DISPERSION THROUGHOUT THE CRYSTALS, WHEREBY TO PRODUCE A DESIRED COLOR, AND THEN FIRING THE COATED BRICK IN ACCORDANCE WITH CUSTOMARY FIRING PROCEDURES.
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) | 1962-09-07 | 1963-03-09 | 1963-09-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-09-07 | 1967-03-09 | 1967-09-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-09-07 | 1971-03-09 | 1971-09-08 | $7700.00 | Window Closed / Lapsed |