US2870048A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Deenameling process
Assignee: International Minerals and Chemical Corp
•
Filing: 1956-10-30
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Granted: 1959-01-20
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Expires: 1976-10-30
Abstract
No abstract record available.
Inventors
- 👤 Woerther Clarence
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 11:52
CPC Classifications
C; C23; C23D; C23D17/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
71 words
IN THE PROCESS OF DEENAMELING METAL WHICH COMPRISES SUBMERGING ENAMELED METAL WARE IN A CONCENTRATED AQUEOUS SOLUTION OF SODIUM HYDROXIDE, SAID SOLUTION HAVING AN ELEVATED SUPERATMOSPHERIC TEMPERATURE, REMOVING THE METAL FROM THE SOLUTION WHEN SUBSTANTIALLY FREE OF ENAMEL, AND WASHING THE METAL WITH AN AQUEOUS MEDIUM, THE IMPROVEMENT WHICH COMPRISES EMPLOYING AN ALUMINUM FLUORIDE-CONTAINING SUBSTANCE IN SAID AQUEOUS SOLUTION OF SODIUM HYDROXIDE, WHEREBY THE TIME REQUIRED FOR DEENAMELING IS SUBSTANTIALLY SHORTENED.
Claim 2
Dependent Claim
71 words
IN THE PROCESS OF DEENAMELING METAL WHICH COMPRISES SUBMERGING ENAMELED METAL WARE IN A CONCENTRATED AQUEOUS SOLUTION OF SODIUM HYDROXIDE, SAID SOLUTION HAVING AN ELEVATED SUPERATMOSPHERIC TEMPERATURE, REMOVING THE METAL FROM THE SOLUTION WHEN SUBSTANTIALLY FREE OF ENAMEL, AND WASHING THE METAL WITH AN AQUEOUS MEDIUM, THE IMPROVEMENT WHICH COMPRISES EMPLOYING AN ALUMINUM FLUORIDE-CONTAINING SUBSTANCE IN SAID AQUEOUS SOLUTION OF SODIUM HYDROXIDE, WHEREBY THE TIME REQUIRED FOR DEENAMELING IS SUBSTANTIALLY SHORTENED.
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) | 1962-01-19 | 1962-07-21 | 1963-01-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-01-19 | 1966-07-21 | 1967-01-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-01-19 | 1970-07-21 | 1971-01-20 | $7700.00 | Window Closed / Lapsed |