US3549430A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Bainitic ductile iron having high strength and toughness
Assignee: Huntington Alloys Corp
•
Filing: 1967-11-14
•
Granted: 1970-12-22
•
Expires: 1987-11-14
Abstract
No abstract record available.
Inventors
- 👤 Frederick K Kies
- 👤 Robert D Schelleng
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 08:11
CPC Classifications
C; C22; C22C; C22C37/00; C22C37/04; F; F01; F01L; F01L1/00; F01L1/12; F01L1/14
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1900125A
Cited
US1910034A
Cited
US1948246A
Cited
US2324322A
Cited
US2485760A
Cited
US2771358A
Cited
US3273998A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-12-21 | 1974-06-22 | 1974-12-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-12-21 | 1978-06-22 | 1978-12-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-12-21 | 1982-06-22 | 1982-12-22 | $7700.00 | Window Closed / Lapsed |