US2753282A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of forming insulating coat on steel and composition therefor
Assignee: Allegheny Ludlum Steel Corp
•
Filing: 1953-07-27
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Granted: 1956-07-03
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Expires: 1973-07-27
Abstract
No abstract record available.
Inventors
- 👤 Paul E Perry
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 00:44
CPC Classifications
C; C23; C23C; C23C22/00; C23C22/73; C23C22/74
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
120 words
A METHOD OF PROVIDING AN IMPROVED INSULATING COATING ON THE SURFACE OF ELECTRICAL STEEL CONTAINING SILICON WHICH COMPRISES, MAKING UP A WATER SOLUTION OF ALL DISSOLVENT CHEMICALS WHEREIN THE WATER SOLVENT FOR THE SOLTUION CONTAINING THE FOLLOWING STATED RANGES OF CHEMICALS REPRESENTS 100 PARTS BY WEIGHT AND THE DISSOLVED SOLUTE CHEMICALS CONSTITUTE: ABOUT 5 TO 75 PARTS BY WEIGHT OF PRIMARY MAGNESIUM PHOSPHATE, ABOUT 10 TO 135 PARTS BY WEIGHT OF MONO BASIC AMMONIUM PHOSPHATE, AND ABOUT 1 TO 6 PARTS BY WEIGHT OF CHROMIC ACID ANHYDRIDE; APPLYING THE SOLUTION AS A FILM TO THE SURFACE OF THE STEEL WHILE THE CHEMICALS ARE IN SOLUTION, AND BAKING THE FILM AND FORMING AN ADHERENT COATING ON THE SURFACE FOR THE STEEL.
Claim 2
Independent Claim
120 words
A METHOD OF PROVIDING AN IMPROVED INSULATING COATING ON THE SURFACE OF ELECTRICAL STEEL CONTAINING SILICON WHICH COMPRISES, MAKING UP A WATER SOLUTION OF ALL DISSOLVENT CHEMICALS WHEREIN THE WATER SOLVENT FOR THE SOLTUION CONTAINING THE FOLLOWING STATED RANGES OF CHEMICALS REPRESENTS 100 PARTS BY WEIGHT AND THE DISSOLVED SOLUTE CHEMICALS CONSTITUTE: ABOUT 5 TO 75 PARTS BY WEIGHT OF PRIMARY MAGNESIUM PHOSPHATE, ABOUT 10 TO 135 PARTS BY WEIGHT OF MONO BASIC AMMONIUM PHOSPHATE, AND ABOUT 1 TO 6 PARTS BY WEIGHT OF CHROMIC ACID ANHYDRIDE; APPLYING THE SOLUTION AS A FILM TO THE SURFACE OF THE STEEL WHILE THE CHEMICALS ARE IN SOLUTION, AND BAKING THE FILM AND FORMING AN ADHERENT COATING ON THE SURFACE FOR THE STEEL.
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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) | 1959-07-03 | 1960-01-02 | 1960-07-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-07-03 | 1964-01-02 | 1964-07-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-07-03 | 1968-01-02 | 1968-07-03 | $7700.00 | Window Closed / Lapsed |