Patent EP0836956A2 successfully refreshed from Google Patents.
US2940941A
Expired / Lapsed
US
⏱️ 0.0 years remaining
R daltqn
Assignee: —
•
Filing: 1953-05-26
•
Granted: 1960-06-14
•
Expires: 1973-05-26
Abstract
No abstract record available.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 12:43
CPC Classifications
H; H10; H10D; H10D62/00; H10D62/80; H10D62/875
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
119 words
A WHITISH PIGMENT POWDER CONSISTING MAINLY OF NORMALLY NON-CONDUCTIVE TITANIUM DIOXIDE WHICH HAS BEEN HEATED IN A NON-OXIDIZING ATMOSPHERE TOGETHER WITH A METALLO ORGANIC COMPOUND WHEREIN THE METAL OF THE COMPOUND HAS A VALENCE OF NOT LESS THAN TWO NOR MORE THAN THREE TO REMOVE THE ORGANIC CONSTITUENTS OF THE COMPOUND AND TO FORM SAID METAL IN SITU THEREFROM, THE METAL CONSTITUTING FROM 0.2 PERCENT TO 20 PERCENT OF THE PIGMENT, THE SAID HEATING HAVING BEEN LIMITED TO A TEMPERATURE RANGING FROM 600 DEGREES C. TO 900 DEGREES C. TO PREVENT SUBSTANTIAL CRYSTAL GROWTH TAKING PLACE IN THE TITANIUM DIOXIDE AND WHICH HAS BEEN COOLED IN A NONOXIDIZING ATMOSPHERE FOR IMPARTING SUBSTANTIAL ELECTRIC CONDUCTIVITY TO THE TITANIUM DIOXIDE ITSELF.
References Cited (Backward Citations)
US2555321A
Cited
US2511216A
Cited
GB648423A
Cited
FR1012093A
Cited
US2699522A
Cited
US2749596A
Cited
US2766509A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-06-14 | 1963-12-14 | 1964-06-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-06-14 | 1967-12-14 | 1968-06-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-06-14 | 1971-12-14 | 1972-06-14 | $7700.00 | Window Closed / Lapsed |