Patent US3394575A successfully refreshed from Google Patents.
US3394575A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Prestressed rolling mill
Assignee: United Engineering and Foundry Co
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Filing: 1965-05-04
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Granted: 1968-07-30
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Expires: 1985-05-04
Abstract
No abstract record available.
Inventors
- 👤 Stone Morris Denor
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 22:54
CPC Classifications
B; B21; B21B; B21B31/00; B21B31/02; B21B31/028; B21B13/00; B21B13/14; B21B13/02; B21B2013/006; B21B27/00; B21B27/02; B21B27/03; B21B31/16; B21B31/20; B21B31/22; B21B31/24; B21B31/32
Claims Analysis
Total Claims: 0
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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) | 1971-07-30 | 1972-01-29 | 1972-07-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-07-30 | 1976-01-29 | 1976-07-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-07-30 | 1980-01-29 | 1980-07-30 | $7700.00 | Window Closed / Lapsed |