US2061331A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Rolling mill screwdown protection
Assignee: Individual
•
Filing: 1935-11-18
•
Granted: 1936-11-17
•
Expires: 1955-11-18
Abstract
No abstract record available.
Inventors
- 👤 Samuel S Roberts
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 06:37
CPC Classifications
F; F16; F16P; F16P3/00; F16P3/02; F16P3/04; B; B21; B21B; B21B31/00; B21B31/16; B21B31/20; B21B31/22; B21B31/24; B23; B23Q; B23Q11/00; B23Q11/08; B23Q11/0825; B21B2203/00; B21B2203/12; Y; Y10; Y10T; Y10T74/00; Y10T74/21; Y10T74/219
Claims Analysis
Total Claims: 0
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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) | 1939-11-17 | 1940-05-18 | 1940-11-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1943-11-17 | 1944-05-18 | 1944-11-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1947-11-17 | 1948-05-18 | 1948-11-17 | $7700.00 | Window Closed / Lapsed |