US3011901A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Ceramic pigment compositions
Assignee: NL Industries Inc
•
Filing: 1958-06-19
•
Granted: 1961-12-05
•
Expires: 1978-06-19
Abstract
No abstract record available.
Inventors
- 👤 Karl W Traub
- 👤 Leon J Frost
- 👤 William J Baldwin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 12:54
CPC Classifications
C; C09; C09C; C09C1/00; C09C1/0009; C09C1/0012; C01; C01P; C01P2004/00; C01P2004/80; C01P2004/82; C01P2006/00; C01P2006/60; C01P2006/80
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
32 words
THE PRODUCT RESULTING FROM CALCINATION WITHOUT FUSION OF A MIXTURE CONSISTING OF FROM ABOUT 0.5% TO ABOUT 3.0% OF B2O3 WITH THE REMAINDER BEING ESSENTIALLY ZIRCONIA OF COMMERICAL GRADE WITH ASSOCIATED IMPURITIES.
Claim 2
Dependent Claim
32 words
THE PRODUCT RESULTING FROM CALCINATION WITHOUT FUSION OF A MIXTURE CONSISTING OF FROM ABOUT 0.5% TO ABOUT 3.0% OF B2O3 WITH THE REMAINDER BEING ESSENTIALLY ZIRCONIA OF COMMERICAL GRADE WITH ASSOCIATED IMPURITIES.
References Cited (Backward Citations)
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Cited
US1001789A
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US2438335A
Cited
US2441447A
Cited
US2847317A
Cited
US2875086A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-12-04 | 1965-06-05 | 1965-12-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-12-04 | 1969-06-05 | 1969-12-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-12-04 | 1973-06-05 | 1973-12-05 | $7700.00 | Window Closed / Lapsed |