Patent US3415103A successfully refreshed from Google Patents.
US3415103A
Expired / Lapsed
US
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Straightening apparatus and method
Assignee: Colonial Broach and Machine Co
•
Filing: 1965-09-20
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Granted: 1968-12-10
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Expires: 1985-09-20
Abstract
No abstract record available.
Inventors
- 👤 Charles H Crawford
- 👤 Harry H Gotberg
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 12:13
CPC Classifications
B; B21; B21D; B21D3/00; B21D3/10
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US170461A
Cited
US320610A
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US2233437A
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US2451302A
Cited
US2635324A
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US2765836A
Cited
US2748829A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1971-12-10 | 1972-06-10 | 1972-12-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-12-10 | 1976-06-10 | 1976-12-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-12-10 | 1980-06-10 | 1980-12-10 | $7700.00 | Window Closed / Lapsed |