Pigments of substantially ternary system having oxides of columbium and transitional elements
Abstract
Abstract PIGMENTS ARE DISCLOSED COMPRISING A SUBSTANTIALLY TERNARY SYSTEM INCLUDING A RUTILE-TYPE SUPPORTING LATTICE AND OXIDES OF COLUMBIUM AND A TRANSITIONAL ELEMENT SELECTED FROM THE GROUP CONSISTING OF NICKEL, CHROMIUM, COBALT, MANGANESE, VANADIUM, AND MIXTURES THEREOF. THE MOLAR RATIOS OF THE OXIDES OF COLUMBIUM AND THE TRANSITIONAL ELEMENT MAY VARY MUCH MORE WIDELY THAN PREVIOUSLY THOUGHT POSSIBLE FOR ADDED COMPONENTS WHILE STILL OBTAINING STABLE PIGMENTS HAVING ACCEPTABLE COLOR STRENGTH AND DURABILITY. IN A PREFERRED FORM, THE PIGMENTS COMPRISE TERNARY OXIDE SYSTEM HAVING TITANIA AS THE RUTILE-TYPE SUPPORTING LATTICE AND ARE FREE OF HEAVY METALS LIKE LEAD, ANTIMONY, MERCURY, AND THE LIKE. OPTIONALLY, THE RUTILETYPE SUPPORTING LATTICE MAY BE REPLACED IN PART BY AN OXIDE OF BARIUM, MAGNESIUM, STRONTIUM, ZINC, CALCIUM OR MIXTURES THEREOF.
Inventors
- 👤 H Lowery
Bibliographic Details
Claims Analysis
Total Claims: 0References 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) | 1977-08-26 | 1978-02-25 | 1978-08-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-08-26 | 1982-02-25 | 1982-08-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-08-26 | 1986-02-25 | 1986-08-27 | $7700.00 | Window Closed / Lapsed |