Patent US2792340A successfully refreshed from Google Patents.
US2792340A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Magnetic materials
Assignee: British Thomson Houston Co Ltd
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Filing: 1953-09-01
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Granted: 1957-05-14
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Expires: 1973-09-01
Abstract
No abstract record available.
Inventors
- 👤 John A James
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 04:49
CPC Classifications
C; C25; C25D; C25D1/00; C25D1/04; C21; C21D; C21D8/00; C21D8/12; C21D8/1277; C25D1/20; H; H01; H01F; H01F1/00; H01F1/01; H01F1/03; H01F1/12; H01F1/14; H01F1/16; C21D8/1244
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
143 words
A PROCESS OF PRODUCING SHEETS OF IRON IN WHICH MAJORITY OF CRYSTALS ARE ALIGNED TO HAVE TWO CUBE EDGES (100) DIRECTIONS SUBSTABTIALLY AT RIGHT ANGLES IN THE PLANE OF THE SHEETS COMPRISING THE STEPS OF FORMING A SHEET OF SUBSTRATE MATERIAL HAVING SAID GRAIN ORIENTATION, ELECTROLYTICALLY DEPOSITING ON THE GRAIN ORIENTED SUBSTATE A COATING OF A SECOND METAL WHICH IS REMOVABLE HAVING A RELATED ORIENTATION, ELECTROLYTICALLY DEPOSITING IRON ON SAID COATED SUBSTRATE USING AN ELECTROLYTE OF APPROXIMATELY 600 GMS. OF FERROUS CHLORIDE, PER LITRE OF WATER AND A PH OF SPPROXIMATELY 1.8 AT A TEMPERATURE OF NOT LESS THAN 50* C. WITH A CURRENT DENSITY OF APPROXIMATELY 1 AMP./DM.2 UNTIL A FILM OF AT LEAST .002" HAS BEEN OBTAINED, REMOVING THE COATED SUBSTRATE WITH THE DEPOSITED FILM FROM THE ELECTROLYTE AND STRIPPING THE FILM FROM THE SUBSTRATE BY REMOVAL OF THE INTERMEDIATE COATING.
Claim 2
Dependent Claim
143 words
A PROCESS OF PRODUCING SHEETS OF IRON IN WHICH MAJORITY OF CRYSTALS ARE ALIGNED TO HAVE TWO CUBE EDGES (100) DIRECTIONS SUBSTABTIALLY AT RIGHT ANGLES IN THE PLANE OF THE SHEETS COMPRISING THE STEPS OF FORMING A SHEET OF SUBSTRATE MATERIAL HAVING SAID GRAIN ORIENTATION, ELECTROLYTICALLY DEPOSITING ON THE GRAIN ORIENTED SUBSTATE A COATING OF A SECOND METAL WHICH IS REMOVABLE HAVING A RELATED ORIENTATION, ELECTROLYTICALLY DEPOSITING IRON ON SAID COATED SUBSTRATE USING AN ELECTROLYTE OF APPROXIMATELY 600 GMS. OF FERROUS CHLORIDE, PER LITRE OF WATER AND A PH OF SPPROXIMATELY 1.8 AT A TEMPERATURE OF NOT LESS THAN 50* C. WITH A CURRENT DENSITY OF APPROXIMATELY 1 AMP./DM.2 UNTIL A FILM OF AT LEAST .002" HAS BEEN OBTAINED, REMOVING THE COATED SUBSTRATE WITH THE DEPOSITED FILM FROM THE ELECTROLYTE AND STRIPPING THE FILM FROM THE SUBSTRATE BY REMOVAL OF THE INTERMEDIATE COATING.
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) | 1960-05-13 | 1960-11-12 | 1961-05-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-05-13 | 1964-11-12 | 1965-05-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-05-13 | 1968-11-12 | 1969-05-14 | $7700.00 | Window Closed / Lapsed |