Patent US2532640A successfully refreshed from Google Patents.
US2532640A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process of enameling
Assignee: Motors Liquidation Co
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Filing: 1946-08-24
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Granted: 1950-12-05
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Expires: 1966-08-24
Abstract
No abstract record available.
Inventors
- 👤 Wilbur H Pfeiffer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 08:05
CPC Classifications
C; C23; C23D; C23D3/00; C23D5/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
131 words
THE PROCESS OF PROVIDING A SMOOTH WHITE ENAMEL PORCELAIN FINISH COATING UPON BARE ENAMELING IRON AND STEEL WHICH CONSISTS IN FIRST HEATING THE BARE IRON AND STEEL IN A NON-OXIDIZING ATMOSHPERE AT A TEMPERATURE OF AT LEAST 1400*F. FOR AT LEAST A HALF HOUR TO REMOVE GASES IN THE IRON AND STEEL AND COOLING THE IRON AND STEEL IN A NON-OXIDIZING ATMOSPHERE SUBSTANTIALLY TO ROOM TEMPERATURE AND THEREAFTER APPLYING A MILLED WHITE PROCELAIN ENAMEL COATING IN THE FORM OF A LIQUID SUSPENSION DIRECTLY TO THE SURFACE OF THE BARE IRON AND STEEL, DRYING THIS COATING, AND HEATING THE COATED IRON AND STEEL AT A TEMPERATURE OF AT LEAST 1500*F. FOR AT LEAST TWO MINUTES TO PROVIDE A FUSED WHITE PROCELAIN ENAMEL COATING UPON THE SURFACE OF THE BARE IRON AND STEEL.
Claim 2
Dependent Claim
131 words
THE PROCESS OF PROVIDING A SMOOTH WHITE ENAMEL PORCELAIN FINISH COATING UPON BARE ENAMELING IRON AND STEEL WHICH CONSISTS IN FIRST HEATING THE BARE IRON AND STEEL IN A NON-OXIDIZING ATMOSHPERE AT A TEMPERATURE OF AT LEAST 1400*F. FOR AT LEAST A HALF HOUR TO REMOVE GASES IN THE IRON AND STEEL AND COOLING THE IRON AND STEEL IN A NON-OXIDIZING ATMOSPHERE SUBSTANTIALLY TO ROOM TEMPERATURE AND THEREAFTER APPLYING A MILLED WHITE PROCELAIN ENAMEL COATING IN THE FORM OF A LIQUID SUSPENSION DIRECTLY TO THE SURFACE OF THE BARE IRON AND STEEL, DRYING THIS COATING, AND HEATING THE COATED IRON AND STEEL AT A TEMPERATURE OF AT LEAST 1500*F. FOR AT LEAST TWO MINUTES TO PROVIDE A FUSED WHITE PROCELAIN ENAMEL COATING UPON THE SURFACE OF THE BARE IRON AND STEEL.
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) | 1953-12-04 | 1954-06-05 | 1954-12-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-12-04 | 1958-06-05 | 1958-12-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-12-04 | 1962-06-05 | 1962-12-05 | $7700.00 | Window Closed / Lapsed |