US2987429A
Expired / Lapsed
US
⏱️ 0.0 years remaining
High-carbon razor blade stock and the like
Assignee: United States Steel Corp
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Filing: 1958-01-07
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Granted: 1961-06-06
•
Expires: 1978-01-07
Abstract
No abstract record available.
Inventors
- 👤 George V Smith
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 18:47
CPC Classifications
C; C21; C21D; C21D8/00; C21D8/02; C21D1/00; C21D1/26; C21D1/32; C21D8/0221; C21D8/0236; C21D8/0247; C21D8/0268
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
35 words
AS A NEW ARTICLE OF MANUFACTURE, A HIGH-CARBON, COLD-REDUCED AND SUBSTANTIALLY NONGRAPHITIZED, SPHEROIDIZED BASIC STEEL PRODUCT CONTAINING .75 TO 1.50% CARBON, LESS THAN .5% CHROMIUM, .045% MAXIUM PHOSPHOROUS AND SULPHUR AND MORE THAN .012% NITROGEN.
References Cited (Backward Citations)
US2174740A
Cited
US2531731A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-06-05 | 1964-12-05 | 1965-06-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-06-05 | 1968-12-05 | 1969-06-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-06-05 | 1972-12-05 | 1973-06-06 | $7700.00 | Window Closed / Lapsed |