US3265600A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of coating silicon steel in conjunction with box annealing thereof preparatory to die punching
Assignee: United States Steel Corp
•
Filing: 1962-12-10
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Granted: 1966-08-09
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Expires: 1982-12-10
Abstract
No abstract record available.
Inventors
- 👤 Paul R Carter
- 👤 Mahlon A Harvey
- 👤 Angela R Pollis
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 09:28
CPC Classifications
C; C23; C23G; C23G1/00; C23G1/02; C23G1/08; C23G1/085; C21; C21D; C21D1/00; C21D1/68; C21D1/70; C23D; C23D5/00; C23D5/10; C25; C25F; C25F1/00; C25F1/02; C25F1/04; C25F1/06
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
83 words
IN CONJUNCTION WITH BOX ANNEALING OF SILICON STEEL STRIP PREPARATORY TO DIE PUNCHING, THE STEPS OF (A) COATING SAID STEEL STRIP WITH A COMPOSITION COMPRISING ESSENTIALLY MGO AND NACI IN WHICH THE NACI IS IN THE PROPORTION OF ABOUT ON (1) PART IN SIX (6) TO ONE (1) PART IN TWENTY-FIVE (25) OF THE WEIGHT OF MGO; (B) BOX ANNEALING SAID COATED RESULTING FROM (C) SUBSEQUENTLY REMOVING THE COATING RESULTING FROM SAID TREATMENT BY PICKLING IN A COMPOSITION COMPRISING NITRIC AND SULFURIC ACIDS.
Claim 2
Dependent Claim
83 words
IN CONJUNCTION WITH BOX ANNEALING OF SILICON STEEL STRIP PREPARATORY TO DIE PUNCHING, THE STEPS OF (A) COATING SAID STEEL STRIP WITH A COMPOSITION COMPRISING ESSENTIALLY MGO AND NACI IN WHICH THE NACI IS IN THE PROPORTION OF ABOUT ON (1) PART IN SIX (6) TO ONE (1) PART IN TWENTY-FIVE (25) OF THE WEIGHT OF MGO; (B) BOX ANNEALING SAID COATED RESULTING FROM (C) SUBSEQUENTLY REMOVING THE COATING RESULTING FROM SAID TREATMENT BY PICKLING IN A COMPOSITION COMPRISING NITRIC AND SULFURIC ACIDS.
Claim 3
Dependent Claim
20 words
THE PROCESS OF CLAIM 1 IN WHICH THE STRIP OR THE LIKE IN MADE SUCCESSIVELY ANODIC AND CATHOLIDE DURING PICKLING.
References Cited (Backward Citations)
US1781730A
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US2197653A
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US2121606A
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US2685564A
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US2772180A
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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) | 1969-08-08 | 1970-02-07 | 1970-08-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-08-08 | 1974-02-07 | 1974-08-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-08-08 | 1978-02-07 | 1978-08-09 | $7700.00 | Window Closed / Lapsed |