US3723101A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Iron base alloys having low levels of volatile metallic impurities
Assignee: Airco Inc
•
Filing: 1970-06-15
•
Granted: 1973-03-27
•
Expires: 1990-06-15
Abstract
Abstract IRON BASE ALLOYS HAVING SUBSTANTIALY IMPROVED PHYSICAL AND MECHANICAL PROPERTIES CONTAINING BETWEEN ABOUT 4 NICKEL LOW LEVELS OF CARBON AND NITROGEN SUCH THAT THE PERATURE, NOT MORE THAN ABOUT 6 P.P.M. TOTAL OF THE INSOLUBLE VOLATILE METALLIC IMPURITES LEAD, BISMUTH, CADMIUM, SODIUM, POTASSIUM, SILVER, CALCIUM. MAGNESIUM, AND BARIUM, AND NOT MORE THAN ABOUT 20 P.P.M. OF THE SOLUBLE VOLATILE METALLIC IMPURITES ZINC AND ANTIMONY. ND ABOUT 40% CHROMIUM, BETWEEN 0 AND ABOUT 15% ARBON AND NITROGEN ARE IN SOLID SOLUTION AT ROOM TE
Inventors
- 👤 C Hunt
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 10:49
CPC Classifications
C; C22; C22C; C22C38/00; C22C38/18; C22C38/40
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-03-26 | 1976-09-25 | 1977-03-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-03-26 | 1980-09-25 | 1981-03-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-03-26 | 1984-09-25 | 1985-03-27 | $7700.00 | Window Closed / Lapsed |