US3499802A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Ferritic,martensitic and ferriteaustenitic chromium steels with reduced tendency to 475 c.-embrittlement
Assignee: Sandvik AB
•
Filing: 1967-05-04
•
Granted: 1970-03-10
•
Expires: 1987-05-04
Abstract
No abstract record available.
Inventors
- 👤 Rune Gunnar Lagneborg
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 08:09
CPC Classifications
C; C22; C22C; C22C38/00; C22C38/18; C22C38/30
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US1745360A
Cited
US2590835A
Cited
US2820708A
Cited
US3068095A
Cited
US3108870A
Cited
US3152934A
Cited
US3250612A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-03-09 | 1973-09-08 | 1974-03-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-03-09 | 1977-09-08 | 1978-03-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-03-09 | 1981-09-08 | 1982-03-10 | $7700.00 | Window Closed / Lapsed |