US3585689A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Compact differential pressure forming machine
Assignee: Leesona Corp
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Filing: 1969-07-30
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Granted: 1971-06-22
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Expires: 1989-07-30
Abstract
Abstract A DIFFERENTIAL PRESSURE FORMING MACHINE FOR FORMING SHAPES IN A SHEET OF DEFORMABLE THERMOPLASTIC MATERIAL INCLUDING MOLDS ON OPPOSITE SIDES OF THE SHEET, AT LEAST ONE OF THE MOLDS HAVING A MOLD CAVITY AND ONE MOLD BEING MOVABLE RELATIVE TO THE OTHER TO SUBSTANTIALLY ENGAGE AND SEPARATE THE MOLDS. THE UPPER MOLD HAS A PLATEN FRAME WITH A LOWER PORTION DISPOSED BELOW THE LOWER MOLD, AND EXPANSIBLE AND CONTRACTIBLE MECHANISM IS SANDWICHED BETWEEN THE LOWER MOLD AND LOWER PORTION OF THE UPPER MOLD PLATEN FRAME AND IS OPERATED TO SEQUENTIALLY MOVE THE MOLDS IN OPPOSITE DIRECTIONS TOWARD THE SHEET.
Inventors
- 👤 Gaylord W Brown
- 👤 Bradley A Schnepp
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 08:44
CPC Classifications
B; B29; B29C; B29C51/00; B29C51/18
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-06-21 | 1974-12-21 | 1975-06-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-06-21 | 1978-12-21 | 1979-06-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-06-21 | 1982-12-21 | 1983-06-22 | $7700.00 | Window Closed / Lapsed |