US2890964A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Vitreous enamel composition
Assignee: Foote Mineral Co
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Filing: 1955-12-12
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Granted: 1959-06-16
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Expires: 1975-12-12
Abstract
No abstract record available.
Inventors
- 👤 Jr Charles H Commons
- 👤 Wayne B Shearer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 11:32
CPC Classifications
C; C03; C03C; C03C8/00; C03C8/02; C03C8/10; C03C8/12; C03C3/00; C03C3/04; C03C3/076; C03C3/11; C03C3/112; C03C3/115; C03C3/118; C03C8/08
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
121 words
A VITREOUS ENAMEL COMPOSITION IN THE FORM OF A FRIT CONSISTING ESSENTIALLY OF BETWEEN ABOUT 13 AND ABOUT 16% OF THE OXIDES OF AT LEAST TWO OF THE ALKALI MEATALS SELECTED FROM THE GROUP CONSISTING OF SODIUM, LITHIUM AND POTASSIUM, BETWEEN ABOUT 1.8 AND ABOUT 5.8% OF AT LEAST ONE OF THE DIVALENT OXIDES SELECTED FROM THE GROUP CONSISTING OF CAO, BAO, MGO, SRO, PBO AND ZNO, BETWEEN ABOUT 7.9 AND ABOUT 11% OF B2O3, BETWEEN ABOUT 0.8 AND ABOUT 2.9% OF P2O5, BETWEEN ABOUT 2 AND ABOUT 6% OF ZRO2, BETWEEN ABOUT 44% OF FLUORINE AND BETWEEN ABOUT 2.5 AND ABOUT 4.9% OF FLUORINE AND BETWEEN ABOUT 18 AND ABOUT 21% OF TIO2, SAID PERCENTAGES BEING ON THE WEIGHT BASIS.
Claim 2
Dependent Claim
121 words
A VITREOUS ENAMEL COMPOSITION IN THE FORM OF A FRIT CONSISTING ESSENTIALLY OF BETWEEN ABOUT 13 AND ABOUT 16% OF THE OXIDES OF AT LEAST TWO OF THE ALKALI MEATALS SELECTED FROM THE GROUP CONSISTING OF SODIUM, LITHIUM AND POTASSIUM, BETWEEN ABOUT 1.8 AND ABOUT 5.8% OF AT LEAST ONE OF THE DIVALENT OXIDES SELECTED FROM THE GROUP CONSISTING OF CAO, BAO, MGO, SRO, PBO AND ZNO, BETWEEN ABOUT 7.9 AND ABOUT 11% OF B2O3, BETWEEN ABOUT 0.8 AND ABOUT 2.9% OF P2O5, BETWEEN ABOUT 2 AND ABOUT 6% OF ZRO2, BETWEEN ABOUT 44% OF FLUORINE AND BETWEEN ABOUT 2.5 AND ABOUT 4.9% OF FLUORINE AND BETWEEN ABOUT 18 AND ABOUT 21% OF TIO2, SAID PERCENTAGES BEING ON THE WEIGHT BASIS.
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) | 1962-06-15 | 1962-12-15 | 1963-06-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-06-15 | 1966-12-15 | 1967-06-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-06-15 | 1970-12-15 | 1971-06-16 | $7700.00 | Window Closed / Lapsed |