US2935423A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for applying a protective coating to a magnesium surface
Assignee: Individual
•
Filing: 1956-09-25
•
Granted: 1960-05-03
•
Expires: 1976-09-25
Abstract
No abstract record available.
Inventors
- 👤 William H Kapfer
- 👤 Kronstein Max
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 15:33
CPC Classifications
C; C23; C23C; C23C22/00; C23C22/05; C23C22/06; C23C22/40
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
135 words
A PROCESS FOR APPLYING A PROTECTIVE COATING TO A MAGNESUIM SURFACE SAID PROCESS COMPRISING THE STEPS OF CLEANSING SAID SURFACE, CONTACTING THE SURFACE WITH AN AQUEOUS SOLUTION HAVING AN ELAVATED TEMPERATURE AND CONSISTING ESSENTIALLY OF 50-95 PARTS BY WEIGHT OF SODUIM PYROPHOSPHATE, 1-5 PARTS BY WEIGHT OF SODIUM FLUORIDE, AND 4-40 PARTS BY WEIGHT OF A METALLIC SALT SELECTED FROM THE GROUP CONSISTING OF CADMUIM SULFATE, COPPER SULFATE, CHRONIUM SULFATE, NICKEL SULFATE, CADMIUM CYANIDE, CHROMIC NITRATE, AND ALUMINUM NITRATE, RINSING THE SURFACE, DRYING THE SAID SURFACE IN THE AIR, IMMERSING THE SAID SURFACE IN A 5-40% BY WEIGHT AQUEOUS SOLUTION HAVING AN ELAVATED TEMPERATURE OF ONE FROM THE GROUP CONSISTING OF IRON PHOSPHATE, AMMONIUM VANADITE, AND SODIUM DICHROMATE, AND RINSING THE SURFACE SO THAT THE COATED SURFACE EXHIBITS A HIGH DEGREE OF UNIFORMITY AND STABILITY.
Claim 2
Dependent Claim
135 words
A PROCESS FOR APPLYING A PROTECTIVE COATING TO A MAGNESUIM SURFACE SAID PROCESS COMPRISING THE STEPS OF CLEANSING SAID SURFACE, CONTACTING THE SURFACE WITH AN AQUEOUS SOLUTION HAVING AN ELAVATED TEMPERATURE AND CONSISTING ESSENTIALLY OF 50-95 PARTS BY WEIGHT OF SODUIM PYROPHOSPHATE, 1-5 PARTS BY WEIGHT OF SODIUM FLUORIDE, AND 4-40 PARTS BY WEIGHT OF A METALLIC SALT SELECTED FROM THE GROUP CONSISTING OF CADMUIM SULFATE, COPPER SULFATE, CHRONIUM SULFATE, NICKEL SULFATE, CADMIUM CYANIDE, CHROMIC NITRATE, AND ALUMINUM NITRATE, RINSING THE SURFACE, DRYING THE SAID SURFACE IN THE AIR, IMMERSING THE SAID SURFACE IN A 5-40% BY WEIGHT AQUEOUS SOLUTION HAVING AN ELAVATED TEMPERATURE OF ONE FROM THE GROUP CONSISTING OF IRON PHOSPHATE, AMMONIUM VANADITE, AND SODIUM DICHROMATE, AND RINSING THE SURFACE SO THAT THE COATED SURFACE EXHIBITS A HIGH DEGREE OF UNIFORMITY AND STABILITY.
References Cited (Backward Citations)
CA518474A
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-05-03 | 1963-11-02 | 1964-05-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-05-03 | 1967-11-02 | 1968-05-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-05-03 | 1971-11-02 | 1972-05-03 | $7700.00 | Window Closed / Lapsed |