Patent US3453848A successfully refreshed from Google Patents.
US3453848A
Expired / Lapsed
US
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Apparatus for deep drawing metal with hydraulically controlled dies
Assignee: DI DRO ENG Co
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Filing: 1965-06-07
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Granted: 1969-07-08
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Expires: 1985-06-07
Abstract
No abstract record available.
Inventors
- 👤 Floyd M Williamson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 09:30
CPC Classifications
B; B21; B21D; B21D24/00; B21D24/10; B21D24/14; B21D22/00; B21D22/20; B21D22/26; B21D22/28
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2192778A
Cited
US961131A
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US1550626A
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US2318819A
Cited
US2485354A
Cited
US2989019A
Cited
US3085530A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-07-07 | 1973-01-06 | 1973-07-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-07-07 | 1977-01-06 | 1977-07-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-07-07 | 1981-01-06 | 1981-07-08 | $7700.00 | Window Closed / Lapsed |