US2800414A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Low-temperature maturing vitrifiable enameling frits
Assignee: 3M Co
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Filing: 1954-11-26
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Granted: 1957-07-23
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Expires: 1974-11-26
Abstract
No abstract record available.
Inventors
- 👤 Norman H Stradley
- 👤 George C Hann
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 21:16
CPC Classifications
C; C03; C03C; C03C8/00; C03C8/02; C03C8/08; C03C2207/00; C03C2207/08
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
91 words
AN ENAMELING FRIT MATURABLE AT TEMPERATURES BELOW APPROXIMATELY 6000* C., SAAID FRIT CONSISTING ESSENTIALLY OF BETWEEN 10 AND 25 CATIONIC MOL PERCENT OF REFACTORY GLASSFORMERS, BETWEEN 35 AND 50 CATIONIC MOL PERCENT OF NON-REFRACTORY GLASSFORMERS OF WHICH AT LEAST ABOUT ONE-HALF IS PO2.5, SAID TOTAL AMOUNT PO2.5 BEING AT LEAST AS GREAT AS THE TOTAL OF ALL SAID REFACTORY GLASSFORMERS AND BETWEEN 25 AND 55 CATIONIC MOL PERCENT OF ALKALI AND ALKALINE EARTH FLUXES, SAID REFRACTORY GLASSFORMERS CONSISTING ESSENTIALLY OF THE FOLLOWING CONSTITUENTS WITH APROXIMATE AMOUNTS SPECIFIED IN CATIONIC MOL PERCENT:
Claim 2
Dependent Claim
91 words
AN ENAMELING FRIT MATURABLE AT TEMPERATURES BELOW APPROXIMATELY 6000* C., SAAID FRIT CONSISTING ESSENTIALLY OF BETWEEN 10 AND 25 CATIONIC MOL PERCENT OF REFACTORY GLASSFORMERS, BETWEEN 35 AND 50 CATIONIC MOL PERCENT OF NON-REFRACTORY GLASSFORMERS OF WHICH AT LEAST ABOUT ONE-HALF IS PO2.5, SAID TOTAL AMOUNT PO2.5 BEING AT LEAST AS GREAT AS THE TOTAL OF ALL SAID REFACTORY GLASSFORMERS AND BETWEEN 25 AND 55 CATIONIC MOL PERCENT OF ALKALI AND ALKALINE EARTH FLUXES, SAID REFRACTORY GLASSFORMERS CONSISTING ESSENTIALLY OF THE FOLLOWING CONSTITUENTS WITH APROXIMATE AMOUNTS SPECIFIED IN CATIONIC MOL PERCENT:
References Cited (Backward Citations)
GB633178A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1960-07-22 | 1961-01-21 | 1961-07-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-07-22 | 1965-01-21 | 1965-07-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-07-22 | 1969-01-21 | 1969-07-23 | $7700.00 | Window Closed / Lapsed |