Patent US3371513A successfully refreshed from Google Patents.
US3371513A
Expired / Lapsed
US
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Open end rolling machine
Assignee: Kaufmann Tool and Engineering Co
•
Filing: 1965-12-09
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Granted: 1968-03-05
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Expires: 1985-12-09
Abstract
No abstract record available.
Inventors
- 👤 Howard S Achler
- 👤 Kaufmann Harold
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 10:38
CPC Classifications
B; B21; B21D; B21D5/00; B21D5/14; B21D5/146; B21D7/00; B21D7/08
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US355390A
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US2454282A
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US2662573A
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US2719562A
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US3094771A
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US3079101A
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US3279234A
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US3300835A
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US3225419A
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US3293728A
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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) | 1971-03-05 | 1971-09-04 | 1972-03-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-03-05 | 1975-09-04 | 1976-03-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-03-05 | 1979-09-04 | 1980-03-05 | $7700.00 | Window Closed / Lapsed |