US2940865A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of applying a glass coating to steel by using an intermediate layer of nickelous oxide
Assignee: AO Smith Corp
•
Filing: 1957-10-14
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Granted: 1960-06-14
•
Expires: 1977-10-14
Abstract
No abstract record available.
Inventors
- 👤 James D Sullivan
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 19:23
CPC Classifications
C; C23; C23D; C23D3/00
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
94 words
A METHOD OF VITREOUS ENAMEL COATING A FERROUS MATERIAL, WHICH COMPRISES CLEANING THE FERROUS MATERIAL, APPLYING A LAYER OF DISCRETE FINE PARTICLES OF NIO DIRECTLY TO THE CLEANED MATERIAL, APPLYING A VITREOUS ENAMEL FRIT TO THE FERROUS MATERIAL OVER THE LAYER OF NIO PARTICLES, AND FIRING THE MATERIAL AT AN ELEVATED TEMPERATURE TO FUSE THE VITREOUS ENAMEL TO THE FERROUS MATERIAL, SAID LAYER OF NIO PARTICLES PROVIDING A SUBSTANTIAL AMOUNT OF SURFACE AREA REACTING WITH THE HYDROGEN DEVELOPED DURING FIRING TO PREVENT FISHSCALING AND PROMOTE ADHERENCE OF SAID VITREOUS ENAMEL TO THE FERROUS MATERIAL.
References Cited (Backward Citations)
US1805143A
Cited
US2010145A
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GB476602A
Cited
US2193640A
Cited
US2244360A
Cited
US2755210A
Cited
US2722085A
Cited
US2581310A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-06-14 | 1963-12-14 | 1964-06-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-06-14 | 1967-12-14 | 1968-06-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-06-14 | 1971-12-14 | 1972-06-14 | $7700.00 | Window Closed / Lapsed |