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US2687660A
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US
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Apparatus for forming blanks
Assignee: National Machinery Co
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Filing: 1951-10-17
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Granted: 1954-08-31
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Expires: 1971-10-17
Abstract
No abstract record available.
Inventors
- 👤 John H Friedman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 06:53
CPC Classifications
B; B21; B21J; B21J13/00; B21J13/08; B21J13/14; B21K; B21K1/00; B21K1/64; B21K1/70; B21K27/00; B21K27/02; B21K27/04
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) | 1957-08-30 | 1958-03-01 | 1958-08-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-08-30 | 1962-03-01 | 1962-08-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-08-30 | 1966-03-01 | 1966-08-31 | $7700.00 | Window Closed / Lapsed |