US2681027A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Metal shaping or drawing dies
Assignee: Sheffield Corp
•
Filing: 1950-04-01
•
Granted: 1954-06-15
•
Expires: 1970-04-01
Abstract
No abstract record available.
Inventors
- 👤 Victor J Boll
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 22:54
CPC Classifications
B; B21; B21D; B21D37/00; B21D37/10
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US307198A
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US318088A
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US1807824A
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US1749184A
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US1787151A
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US1854630A
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US1946991A
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US2105289A
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US2101888A
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US2272547A
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US2518422A
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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 |