Patent US1952345A successfully refreshed from Google Patents.
Patent US3098758A successfully refreshed from Google Patents.
US3098758A
Expired / Lapsed
US
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Vitreous enamel-coated ferrous article and method of making the same
Assignee: AO Smith Corp
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Filing: 1961-05-19
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Granted: 1963-07-23
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Expires: 1981-05-19
Abstract
No abstract record available.
Inventors
- 👤 James D Sullivan
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 01:45
CPC Classifications
C; C23; C23D; C23D3/00; C03; C03C; C03C3/00; C03C3/04; C03C3/076; C03C3/089; Y; Y10; Y10T; Y10T428/00; Y10T428/27; Y10T428/273
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
79 words
A VITREOUS ENAMEL BASE STOCK, COMPRISING A FERROUS BASE HAVING A COATING OF FINELY DIVIDED PARTICLES THEREON, SAID PARTICLES COMPRISING A NUCLEUS OF NICKLEOUS OXIDE AND AN OUTER LAYER OF NICKEL-ALKALI METAL OXIDE CRYSTALS BONDED TO SAID NUCLEUS, SAID PARTICLES BEING PRESENT IN AN AMOUNT GREATER THAN 0. 05 GRAM OF DRY PARTICLES PER SQUARE FOOT OF FERROUS BASE SERVING TO PREVENT HYDROGEN DEFECTS AND IMPROVE ADHERENCE BETWEEN THE FERROUS BASE AND A VITREOUS ENAMEL COATING SUBSEQUENTLY APPLIED THERETO
Claim 2
Dependent Claim
109 words
A MEHOD OF GLASS COATING STEEL TO ELIMINATE FISHCALING AND OTHER HYDROGEN DEFECTS IN THE GLASS COATING, COMPRISING APPLYING A LAYER OF NICKEL-ALKALI METAL OXIDE CRYSTALS TO THE OUTER SURFACE OF FINE PARTICLES OF NICKELOUS OXIDE TO PROVIDE A PLURALITY OF DIVIDED COMPOSITE PARTICLES, APPLYING THE COMPOSITE PARTICLES TO A SURFACE OF THE STEEL IN AN AMOUNT GREATER THAN 0.05 GRAM PER SQUARE FOOT OF STEEL SURFACE APPLYING A GLASS COMPOSITION TO A SURFACE OF THE STEEL BASE, AND FIRING THE STEEL AT AN ELEVATED TEMPERATURE TO FUSE THE GLASS TO THE STEEL WITH THE COMPOSITE PARTICLES SERVING TO ELIMINATE FISHSCALING AND OTHER HYDROGEN DEFECTS DURING THE FIRING OPERATION.
References Cited (Backward Citations)
US2843507A
Cited
US2940865A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1966-07-22 | 1967-01-21 | 1967-07-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-07-22 | 1971-01-21 | 1971-07-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-07-22 | 1975-01-21 | 1975-07-23 | $7700.00 | Window Closed / Lapsed |