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US3396561A
Expired / Lapsed
US
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Hydraulic die assembly for the forming of sheet material
Assignee: Houdaille Industries Inc
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Filing: 1965-05-19
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Granted: 1968-08-13
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Expires: 1985-05-19
Abstract
No abstract record available.
Inventors
- 👤 Lawrence E Day
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 14:46
CPC Classifications
B; B21; B21D; B21D22/00; B21D22/10; B21D22/12
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2317869A
Cited
US2786728A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1971-08-13 | 1972-02-12 | 1972-08-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-08-13 | 1976-02-12 | 1976-08-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-08-13 | 1980-02-12 | 1980-08-13 | $7700.00 | Window Closed / Lapsed |