Patent US3844812A successfully refreshed from Google Patents.
US3844812A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Colorant composition for clay products and method of making colored clay products
Assignee: Foote Mineral Co
•
Filing: 1972-12-15
•
Granted: 1974-10-29
•
Expires: 1992-12-15
Abstract
Abstract A mixture of an ore of at least one of the metals manganese, chromium and iron and a color-promoting flux serves as an expecially useful colorant composition for shaped clay products. A method for preparing shaped clay products with improved color characteristics is also described and claimed herein.
Inventors
- 👤 J Fishwick
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 13:06
CPC Classifications
C; C04; C04B; C04B33/00; C04B33/02; C04B33/13; C04B33/14
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
73 words
A COLORANT COMPOSITION FOR SHAPED CLAY PRODUCTS CONSISTING ESSENTIALLY OF A FINELY-DIVIDED MIXTURE OF FROM ABOUT 90 TO 99 PERCENT OF AN ORE SELECTED FROM THE GROUP CONSISTING OF MANGANESE, CHROMIUM, AND IRON, AND FROM ABOUT 1 TO ABOUT 10 PERCENT OF A COLOR-PROMOTING FLUEX SELECTED FROM THE GROUP CONSISTING OF BORAX, RASORITE, COLEMANITE, NEPHELINE SYENITE, MICA AND TALC, SAID PERCENTAGES BEING BY WEIGHT, BASED ON THE TOTAL WEIGHT OF SAID COLORANT COMPOSITION.
Claim 2
Dependent Claim
73 words
A COLORANT COMPOSITION FOR SHAPED CLAY PRODUCTS CONSISTING ESSENTIALLY OF A FINELY-DIVIDED MIXTURE OF FROM ABOUT 90 TO 99 PERCENT OF AN ORE SELECTED FROM THE GROUP CONSISTING OF MANGANESE, CHROMIUM, AND IRON, AND FROM ABOUT 1 TO ABOUT 10 PERCENT OF A COLOR-PROMOTING FLUEX SELECTED FROM THE GROUP CONSISTING OF BORAX, RASORITE, COLEMANITE, NEPHELINE SYENITE, MICA AND TALC, SAID PERCENTAGES BEING BY WEIGHT, BASED ON THE TOTAL WEIGHT OF SAID COLORANT COMPOSITION.
Claim 3
Dependent Claim
29 words
The colorant composition of claim 1 containing from about 95 to about 99 percent of said ore and from about 1 to about 5 percent of said color-promoting flux.
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) | 1977-10-28 | 1978-04-29 | 1978-10-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-10-28 | 1982-04-29 | 1982-10-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-10-28 | 1986-04-29 | 1986-10-29 | $7700.00 | Window Closed / Lapsed |