Patent US2742074A successfully refreshed from Google Patents.
US1968442A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process of heating and rolling steel in an inert gas inclosure
Assignee: Individual
•
Filing: 1931-09-05
•
Granted: 1934-07-31
•
Expires: 1951-09-05
Abstract
No abstract record available.
Inventors
- 👤 Emerson L Clark
- 👤 Earl W Clark
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 20:41
CPC Classifications
B; B21; B21B; B21B9/00; Y; Y10; Y10S; Y10S82/00; Y10S82/90; Y10T; Y10T29/00; Y10T29/49; Y10T29/49826
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) | 1937-07-30 | 1938-01-29 | 1938-07-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1941-07-30 | 1942-01-29 | 1942-07-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1945-07-30 | 1946-01-29 | 1946-07-31 | $7700.00 | Window Closed / Lapsed |