US3095321A
Expired / Lapsed
US
⏱️ 0.0 years remaining
High hardness porcelain enamel composition, method of coating therewith and article produced thereby
Assignee: American Lava Corp
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Filing: 1961-06-05
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Granted: 1963-06-25
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Expires: 1981-06-05
Abstract
No abstract record available.
Inventors
- 👤 James G Breedlove
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 22:33
CPC Classifications
C; C03; C03C; C03C8/00; C03C8/14; C03C8/16; C03C8/02; C03C2207/00; C03C2207/08
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
113 words
AS A NEW ARTICLE OF MANUFACTURE: AN ARTICLE HAVING A METAL BASE MEMBER AND A HIGH HARDNESS PORCELAIN ENAMEL COATING ADHERENT TO SAID BASE MEMBER, SAID PORCELAIN ENAMEL COATING BEING FORMED BY FIRING TO MATURATION A COATING COMPRISING GLASSY FRIT PARTICLES SUITABLE FOR USE IN PROVIDING A PORCELAIN ENAMEL COATING ON ALUMINUM BASE MATERIALS, SAID GLASSY FRIT PARTICLES BEING MATURABLE AT TEMPERATURES NOT IN EXCESS OF 600*C. INTO A PORCELAIN ENAMEL WHICH EXHIBITS A COEFFICIENT OF THERMAL EXPANSION OF AT LEAST 10 X 10**6 PER *C. BETWEEN 50 AND 350*C., AND BETWEEN 5 AND 100 PARTS BY WEIGHT OF MAGNESIUM ALUMINATE SPINEL FOR EVERY 100 PARTS BY WEIGHT OF SAID GLASSY FRIT MATERIAL.
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) | 1966-06-24 | 1966-12-24 | 1967-06-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-06-24 | 1970-12-24 | 1971-06-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-06-24 | 1974-12-24 | 1975-06-25 | $7700.00 | Window Closed / Lapsed |