US2969293A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Vitreous enamel
Assignee: Kimble Glass Inc
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Filing: 1956-12-31
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Granted: 1961-01-24
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Expires: 1976-12-31
Abstract
No abstract record available.
Inventors
- 👤 Dudley C Smith
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 08:07
CPC Classifications
C; C03; C03C; C03C4/00; C03C17/00; C03C17/02
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
89 words
A VITREOUS ENAMEL FOR DECORATING A LOW EXPANSION BOROSILICATE GLASS CONSISTING OF AN INTIMATE MIXTURE OF (A) 20 TO 95% OF A LEAD OXIDE TYPE ENAMEL COMPONENT CONTAINING AT LEAST 48% OF PBO AND AT LEAST 75% OF PBO AND SIO2 COMBINED AND (B) 5 TO 80% OF A FINELY DIVIDED SILICA-CONTAINING MATERIAL SELECTED FROM THE CLASS CONSISTING OF AMORPHOUS SILICA, BETA EUCRYPTITE, SPODUMENE, AND PETALITE, THE AMOUNT OF SAID MATERIAL BEING SELECTED TO REDUCE THE THERMAL EXPANSION COEFFICIENT OF THE MIXTURE TO SUBSTANTIALLY THAT OF THE BOROSILICATE GLASS.
Claim 2
Dependent Claim
89 words
A VITREOUS ENAMEL FOR DECORATING A LOW EXPANSION BOROSILICATE GLASS CONSISTING OF AN INTIMATE MIXTURE OF (A) 20 TO 95% OF A LEAD OXIDE TYPE ENAMEL COMPONENT CONTAINING AT LEAST 48% OF PBO AND AT LEAST 75% OF PBO AND SIO2 COMBINED AND (B) 5 TO 80% OF A FINELY DIVIDED SILICA-CONTAINING MATERIAL SELECTED FROM THE CLASS CONSISTING OF AMORPHOUS SILICA, BETA EUCRYPTITE, SPODUMENE, AND PETALITE, THE AMOUNT OF SAID MATERIAL BEING SELECTED TO REDUCE THE THERMAL EXPANSION COEFFICIENT OF THE MIXTURE TO SUBSTANTIALLY THAT OF THE BOROSILICATE GLASS.
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) | 1964-01-24 | 1964-07-25 | 1965-01-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-01-24 | 1968-07-25 | 1969-01-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-01-24 | 1972-07-25 | 1973-01-24 | $7700.00 | Window Closed / Lapsed |