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Patent US3455142A successfully refreshed from Google Patents.
US3455142A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Tube bending mandrel
Assignee: Tools for Bending Inc
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Filing: 1965-08-12
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Granted: 1969-07-15
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Expires: 1985-08-12
Abstract
No abstract record available.
Inventors
- 👤 Charles H Roberts
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 10:26
CPC Classifications
B; B21; B21D; B21D9/00; B21D9/01; B21D9/03; F; F16; F16C; F16C11/00; F16C11/04; F16C11/06; F16C11/0619
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2971556A
Cited
US3286503A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-07-14 | 1973-01-13 | 1973-07-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-07-14 | 1977-01-13 | 1977-07-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-07-14 | 1981-01-13 | 1981-07-15 | $7700.00 | Window Closed / Lapsed |