US2680978A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Production of sheet and strip
Assignee: British Iron and Steel Research Association BISRA
•
Filing: 1951-07-03
•
Granted: 1954-06-15
•
Expires: 1971-07-03
Abstract
No abstract record available.
Inventors
- 👤 Hessenberg Wilfrid C Frederick
- 👤 Sims Raymond Bernard
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 16:39
CPC Classifications
B; B21; B21C; B21C37/00; B21C37/02; B21B; B21B37/00; B21B37/58; B21B37/64
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US2342374A
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US2332288A
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1957-06-14 | 1957-12-14 | 1958-06-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-06-14 | 1961-12-14 | 1962-06-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-06-14 | 1965-12-14 | 1966-06-15 | $7700.00 | Window Closed / Lapsed |