Patent US1780673A successfully refreshed from Google Patents.
Patent USRE28027E successfully refreshed from Google Patents.
USRE28027E
Expired / Lapsed
US
⏱️ 0.0 years remaining
Cold rolling work roll
Assignee: —
•
Filing: 1973-03-30
•
Granted: 1974-06-04
•
Expires: 1993-03-30
Abstract
Abstract A WORK ROLL FOR COLD ROLLING STEEL SHEETS OR STRIP HAS A PLURALITY OF SHALLOW GENERALLY FRUSTOSPHERICAL DEPRESSIONS IN ITS OUTER SURFACE. THE VAST MAJORITY OF THE DEPRESSIONS ARE OF SUBSTANTIALLY UNIFORM SHAPE AND DEPTH, BUT MAY BE RANDOMLY SPACED OVER THE ROLL SURFACE. WHEN THE SHEET IS ROLLED BETWEEN TWO ROLLS, AT LEAST ONE OF WHICH HAS THE DESCRIBED SURFACE, LOW GENRALLY FRUSTOSPHERICAL PROJECTIONS OF SUBSTANTIALLY UNIFORM SHAPE AND HEIGHT ARE OBTAINED ON THAT SIDE OF THE STEIP IN CONTACT WITH THE SURFACED ROLL.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 08:59
CPC Classifications
B; B21; B21B; B21B27/00; B21B27/005; B21B2267/00; B21B2267/10
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) | 1977-06-03 | 1977-12-03 | 1978-06-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-06-03 | 1981-12-03 | 1982-06-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-06-03 | 1985-12-03 | 1986-06-04 | $7700.00 | Window Closed / Lapsed |