US2812673A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Mandrel guiding arrangement for billet piercing apparatus
Assignee: Babcock and Wilcox Co
•
Filing: 1953-08-14
•
Granted: 1957-11-12
•
Expires: 1973-08-14
Abstract
No abstract record available.
Inventors
- 👤 Harter Isaac
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 21:50
CPC Classifications
B; B21; B21J; B21J9/00; B21J9/02; B21J9/04
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US534665A
Cited
US1206250A
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GB110106A
Cited
US1464146A
Cited
FR698303A
Cited
US2138867A
Cited
US2261304A
Cited
US2537867A
Cited
US2586943A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1960-11-11 | 1961-05-13 | 1961-11-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-11-11 | 1965-05-13 | 1965-11-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-11-11 | 1969-05-13 | 1969-11-12 | $7700.00 | Window Closed / Lapsed |