Patent US3475937A successfully refreshed from Google Patents.
US3475937A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Roll forming apparatus
Assignee: Individual
•
Filing: 1966-08-01
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Granted: 1969-11-04
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Expires: 1986-08-01
Abstract
No abstract record available.
Inventors
- 👤 James R Lawler
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 09:24
CPC Classifications
B; B21; B21D; B21D5/00; B21D5/06; B21D5/08
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1996500A
Cited
US2176115A
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US2248088A
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US2471490A
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US3051214A
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US3107718A
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US3251211A
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US3251210A
Cited
US3355922A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-11-03 | 1973-05-05 | 1973-11-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-11-03 | 1977-05-05 | 1977-11-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-11-03 | 1981-05-05 | 1981-11-04 | $7700.00 | Window Closed / Lapsed |