US2806508A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Bar straightening machine
Assignee: Blaw Knox Co
•
Filing: 1953-12-18
•
Granted: 1957-09-17
•
Expires: 1973-12-18
Abstract
No abstract record available.
Inventors
- 👤 Siegerist Walter Laurenz
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 21:16
CPC Classifications
B; B21; B21D; B21D3/00; B21D3/02; B21D3/05
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
DE164181C
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US790706A
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US1545215A
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US1414371A
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US1588817A
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US2405128A
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US2566399A
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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) | 1960-09-16 | 1961-03-18 | 1961-09-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-09-16 | 1965-03-18 | 1965-09-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-09-16 | 1969-03-18 | 1969-09-17 | $7700.00 | Window Closed / Lapsed |