US2748066A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process of enameling steel
Assignee: Republic Steel Corp
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Filing: 1951-09-20
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Granted: 1956-05-29
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Expires: 1971-09-20
Abstract
No abstract record available.
Inventors
- 👤 Irving P Whitehouse
- 👤 Fred E Kendall
- 👤 Golar Paul
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 04:57
CPC Classifications
C; C23; C23D; C23D3/00; C23D5/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
77 words
THE METHOD OF PRODUCING A TENACIOUSLY ADHERING, UNIFORM AND CONTINUOUS PORCELAIN ENAMEL FINISH COAT ON A STEEL ARTICLE HAVING A CARBON CONTENT BETWEEN ABOUT 0.01% AND ABOUT 0.30% WHICH CONSISTS ESSENTIALLY OF THE STEPS OF UNIFORMLY AND REGULARLY REMOVING A SURFACE PORTION OF SAID ARTICLE EQUIVALENT TO AT LEAST ABOUT 0.01 GRAM PER SQUARE INCH AND THEREBY PRODUCING A SURFACE ON THE ARTICLE SUBSTANTIALLY FREE OF GAS-RETAINING RECESSES DUE TO EXCESSIVE PITTING, ETCHING OR ROUGHNESS, CHEMICALLY BUT
Claim 2
Independent Claim
77 words
THE METHOD OF PRODUCING A TENACIOUSLY ADHERING, UNIFORM AND CONTINUOUS PORCELAIN ENAMEL FINISH COAT ON A STEEL ARTICLE HAVING A CARBON CONTENT BETWEEN ABOUT 0.01% AND ABOUT 0.30% WHICH CONSISTS ESSENTIALLY OF THE STEPS OF UNIFORMLY AND REGULARLY REMOVING A SURFACE PORTION OF SAID ARTICLE EQUIVALENT TO AT LEAST ABOUT 0.01 GRAM PER SQUARE INCH AND THEREBY PRODUCING A SURFACE ON THE ARTICLE SUBSTANTIALLY FREE OF GAS-RETAINING RECESSES DUE TO EXCESSIVE PITTING, ETCHING OR ROUGHNESS, CHEMICALLY BUT
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1959-05-29 | 1959-11-28 | 1960-05-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-05-29 | 1963-11-28 | 1964-05-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-05-29 | 1967-11-28 | 1968-05-29 | $7700.00 | Window Closed / Lapsed |