US3736128A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Stainless steel with a high boron content
Assignee: Pechiney SA
•
Filing: 1971-06-04
•
Granted: 1973-05-29
•
Expires: 1991-06-04
Abstract
Abstract A STAINLESS STEEL COMPRISING FROM 20 TO 30% BY WEIGHT CHROMIUM, UP TO 5% NICKEL AND FROM 2 TO 6% BORON WHICH CAN BE WORKED.
Inventors
- 👤 Cadenet J De
- 👤 A Gueussier
- 👤 R Tricot
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 23:04
CPC Classifications
C; C22; C22C; C22C38/00; C22C38/18; C22C38/32
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) | 1976-05-28 | 1976-11-27 | 1977-05-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-05-28 | 1980-11-27 | 1981-05-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-05-28 | 1984-11-27 | 1985-05-29 | $7700.00 | Window Closed / Lapsed |