US3511250A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Descaling apparatus
Assignee: United States Steel Corp
•
Filing: 1968-07-25
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Granted: 1970-05-12
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Expires: 1988-07-25
Abstract
No abstract record available.
Inventors
- 👤 Francis Gallucci
- 👤 Gottfried Hofmann
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 19:26
CPC Classifications
B; B21; B21B; B21B45/00; B21B45/04; B21B45/08; B21B1/00; B21B1/46; Y; Y10; Y10T; Y10T29/00; Y10T29/45; Y10T29/4533; Y10T29/4544
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) | 1973-05-11 | 1973-11-10 | 1974-05-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-05-11 | 1977-11-10 | 1978-05-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-05-11 | 1981-11-10 | 1982-05-12 | $7700.00 | Window Closed / Lapsed |