Patent US3278346A successfully refreshed from Google Patents.
US3278346A
Expired / Lapsed
US
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Electric alloy steel containing vanadium and sulfur
Assignee: Individual
•
Filing: 1965-03-16
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Granted: 1966-10-11
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Expires: 1985-03-16
Abstract
No abstract record available.
Inventors
- 👤 Norman P Goss
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 12:13
CPC Classifications
H; H01; H01F; H01F1/00; H01F1/01; H01F1/03; H01F1/12; H01F1/14; H01F1/147; H01F1/14766; H01F1/14775
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
52 words
SILICON STEEL IN SHEET FORM CONSISTING ESSENTIALLY OF BETWEEN .008 AND .05% VANADIUM AND BETWEEN APPROXIMATELY .003% AND .009% SULFUR, BETWEEN 2.8% AND 3.3% SILICON AND THE BALANCE IRON AND SUFFICIENTLY FREE FROM INCLUSIONS OF FINELY DISPERSED OXIDES TO HAVE AN INITIAL PERMEABILITY OF OVER 1450 TO PRODUCE APPROXIMATELY 90% GRAIN ORIENTATION.
Claim 2
Dependent Claim
52 words
SILICON STEEL IN SHEET FORM CONSISTING ESSENTIALLY OF BETWEEN .008 AND .05% VANADIUM AND BETWEEN APPROXIMATELY .003% AND .009% SULFUR, BETWEEN 2.8% AND 3.3% SILICON AND THE BALANCE IRON AND SUFFICIENTLY FREE FROM INCLUSIONS OF FINELY DISPERSED OXIDES TO HAVE AN INITIAL PERMEABILITY OF OVER 1450 TO PRODUCE APPROXIMATELY 90% GRAIN ORIENTATION.
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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) | 1969-10-10 | 1970-04-11 | 1970-10-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-10-10 | 1974-04-11 | 1974-10-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-10-10 | 1978-04-11 | 1978-10-11 | $7700.00 | Window Closed / Lapsed |