US2961337A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of metal preparation for porcelain enameling
Assignee: Vibrantz Corp
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Filing: 1958-10-08
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Granted: 1960-11-22
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Expires: 1978-10-08
Abstract
No abstract record available.
Inventors
- 👤 Eugene E Bryant
- 👤 Vaylord R Luster
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 19:48
CPC Classifications
C; C23; C23D; C23D3/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
76 words
IN THE PROCESS OF PREPARING FERROUS BASE METAL FOR DIRECT-ON PORCELAIN ENAMELING IN WHICH THE METAL IS SUBJECTED TO A PRELIMINARY CLEANING OPERATION, THE STEPS FOLLOWING SAID CLEANING OPERATION OF HEAT-TREATING THE FERROUS BASE METAL AT A TEMPERATURE OF BETWEEN ABOUT 1000* F. AND 1300* F. LONG ENOUGH TO OXIDIZE FROM ABOUT ONE TO FOUR GRAMS BASE METAL PER SQUARE FOOT OF SURFACE, AND THEREAFTER APPLYING A PORCELAIN ENAMEL COVER COAT DIRECTLY TO THE BASE METAL.
Claim 2
Dependent Claim
76 words
IN THE PROCESS OF PREPARING FERROUS BASE METAL FOR DIRECT-ON PORCELAIN ENAMELING IN WHICH THE METAL IS SUBJECTED TO A PRELIMINARY CLEANING OPERATION, THE STEPS FOLLOWING SAID CLEANING OPERATION OF HEAT-TREATING THE FERROUS BASE METAL AT A TEMPERATURE OF BETWEEN ABOUT 1000* F. AND 1300* F. LONG ENOUGH TO OXIDIZE FROM ABOUT ONE TO FOUR GRAMS BASE METAL PER SQUARE FOOT OF SURFACE, AND THEREAFTER APPLYING A PORCELAIN ENAMEL COVER COAT DIRECTLY TO THE BASE METAL.
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) | 1963-11-22 | 1964-05-23 | 1964-11-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-11-22 | 1968-05-23 | 1968-11-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-11-22 | 1972-05-23 | 1972-11-22 | $7700.00 | Window Closed / Lapsed |