Patent US3396951A successfully refreshed from Google Patents.
US3396951A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Emergency atmosphere annealing furnace and method
Assignee: Electric Furnace Co
•
Filing: 1965-08-25
•
Granted: 1968-08-13
•
Expires: 1985-08-25
Abstract
No abstract record available.
Inventors
- 👤 Cope F Troy
- 👤 Ralph J Perrine
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 10:01
CPC Classifications
C; C21; C21D; C21D9/00; C21D9/52; C21D9/54; C21D9/56; C21D9/561; C21D1/00; C21D1/74; C21D1/76; C21D9/0006; C23; C23C; C23C2/00; C23C2/003; C23C2/0034; C23C2/00342; C23C2/00344; C23C2/0035; C23C2/0038; C23C2/02; C23C2/022; C23C2/0224
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1971-08-13 | 1972-02-12 | 1972-08-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-08-13 | 1976-02-12 | 1976-08-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-08-13 | 1980-02-12 | 1980-08-13 | $7700.00 | Window Closed / Lapsed |