Patent US2893277A successfully refreshed from Google Patents.
US2893277A
Expired / Lapsed
US
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Process and tool for perforating ingots
Assignee: Individual
•
Filing: 1957-07-25
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Granted: 1959-07-07
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Expires: 1977-07-25
Abstract
No abstract record available.
Inventors
- 👤 Beisner Karl
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-10 01:26
CPC Classifications
B; B21; B21J; B21J9/00; B21J9/02; B21J9/04
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US408377A
Cited
DE498176C
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GB190415141A
Cited
DE457856C
Cited
US2039438A
Cited
US2385574A
Cited
US2368980A
Cited
US2396108A
Cited
US2809750A
Cited
US2778494A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-07-06 | 1963-01-05 | 1963-07-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-07-06 | 1967-01-05 | 1967-07-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-07-06 | 1971-01-05 | 1971-07-07 | $7700.00 | Window Closed / Lapsed |