Patent US3390566A successfully refreshed from Google Patents.
US3390566A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Fin-tube panel bending apparatus
Assignee: Foster Wheeler Inc
•
Filing: 1965-12-10
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Granted: 1968-07-02
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Expires: 1985-12-10
Abstract
No abstract record available.
Inventors
- 👤 Lawrence E Conklin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 16:46
CPC Classifications
B; B21; B21D; B21D7/00; B21D7/06
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1775762A
Cited
US2451302A
Cited
US2979103A
Cited
US3021886A
Cited
US3145757A
Cited
US3196661A
Cited
US3306093A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1971-07-02 | 1972-01-01 | 1972-07-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-07-02 | 1976-01-01 | 1976-07-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-07-02 | 1980-01-01 | 1980-07-02 | $7700.00 | Window Closed / Lapsed |