Patent US3152889A successfully refreshed from Google Patents.
US3152889A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Free machining steel with lead and tellurium
Assignee: Inland Steel Co
•
Filing: 1961-10-31
•
Granted: 1964-10-13
•
Expires: 1981-10-31
Abstract
No abstract record available.
Inventors
- 👤 Michael O Holowaty
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 02:57
CPC Classifications
C; C22; C22C; C22C38/00; C22C38/18; C22C38/60; D; D05; D05B; D05B23/00; D05B29/00; D05B29/02
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
38 words
A FREE MACHINING STEEL CONSISTING ESSENTIALLY OF: 0.02-0.50 WT. PERCENT TELLURIUM; 0.02-0.50 WT PERCENT SULPHUR; 0.02-0.50 WT. PERCENT LEAD; LESS THAN 5 WT. PERCENT CHROMIUM; UP TO 1 WT PERCENT CARBON; AND A BALANCE CONSISTING ESSENTIALLY OF IRON.
Claim 2
Dependent Claim
38 words
A FREE MACHINING STEEL CONSISTING ESSENTIALLY OF: 0.02-0.50 WT. PERCENT TELLURIUM; 0.02-0.50 WT PERCENT SULPHUR; 0.02-0.50 WT. PERCENT LEAD; LESS THAN 5 WT. PERCENT CHROMIUM; UP TO 1 WT PERCENT CARBON; AND A BALANCE CONSISTING ESSENTIALLY OF IRON.
References Cited (Backward Citations)
US2009714A
Cited
US2182758A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1967-10-13 | 1968-04-13 | 1968-10-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-10-13 | 1972-04-13 | 1972-10-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-10-13 | 1976-04-13 | 1976-10-13 | $7700.00 | Window Closed / Lapsed |