US2538992A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electrolytically deposited iron products
Assignee: Buel Metals Co
•
Filing: 1947-01-15
•
Granted: 1951-01-23
•
Expires: 1967-01-15
Abstract
No abstract record available.
Inventors
- 👤 Harold V Trask
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 12:40
CPC Classifications
C; C25; C25C; C25C1/00; C25C1/06; Y; Y10; Y10T; Y10T428/00; Y10T428/12; Y10T428/12479
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
52 words
AN ELECTROLYTICALLY DEPOSITED, POROUS IRON CHARACTERIZED BY ITS DULL GRAY COLOR, HARDNESS, DIAMOND SCALE, 400 TO 520; SPECIFIC GRAVITY BETWEEN 6.3 AND 7.25; WEIGHT LOSS AFTER HEATING IN NITROGEN AT 950 DEGREES C. FOR ONE HOUR, 1.00 TO 1.55,; WEIGHT LOSS AFTER HEATING IN HYDROGEN AT 950 IRON AFTER REDUCTION, ABOVE 99.5%.
Claim 2
Dependent Claim
52 words
AN ELECTROLYTICALLY DEPOSITED, POROUS IRON CHARACTERIZED BY ITS DULL GRAY COLOR, HARDNESS, DIAMOND SCALE, 400 TO 520; SPECIFIC GRAVITY BETWEEN 6.3 AND 7.25; WEIGHT LOSS AFTER HEATING IN NITROGEN AT 950 DEGREES C. FOR ONE HOUR, 1.00 TO 1.55,; WEIGHT LOSS AFTER HEATING IN HYDROGEN AT 950 IRON AFTER REDUCTION, ABOVE 99.5%.
References Cited (Backward Citations)
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US2157699A
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US2223928A
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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) | 1954-01-22 | 1954-07-24 | 1955-01-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-01-22 | 1958-07-24 | 1959-01-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-01-22 | 1962-07-24 | 1963-01-23 | $7700.00 | Window Closed / Lapsed |