US3557411A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Vacuum mixer
Assignee: F G FINA SpA
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Filing: 1968-01-31
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Granted: 1971-01-26
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Expires: 1988-01-31
Abstract
Abstract A VACUUM MIXER DESIGNED FOR MIXING AND TRANSFERRING UNDER VACUUM SPECIAL PASTES AND GYPSUM FOR USE IN DENTAL AND JEWELLER''S ART AND LIKE APPLICATIONS, COMPRISING A VESSEL WHEREIN THE PAST CAN BE MANUALLY OR MECHANICALLY MIXED AND ONE OR ORE MOLD CONTAINERS THAT CAN BE SELECTIVELY DRIVEN UNDER A VESSEL EXHAUST PORT. THE VESSEL AND MOLD CONTAINERS ARE PLACED INSIDE A JAR BELL, WHICH CAN BE CONNECTED TO A VACUUM SOURCE AND COMPRISES MEANS TO CONTROL FROM THE OUTSIDE THE MIXING AND TRANSFERRING OPERATIONS. ADVANTAGEOUSLY, SAID JAR BELL CAN BE JOINED TO A VIBRATING DEVICE TO IMPROVE THE PAST DISCHARGING AND FILLING OF MOLDS.
Inventors
- 👤 Angelo Ravasi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 19:03
CPC Classifications
A; A61; A61C; A61C9/00; A61C9/0026; B; B01; B01F; B01F33/00; B01F33/70; A61C5/00; A61C5/60; A61C5/68
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) | 1974-01-25 | 1974-07-27 | 1975-01-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-01-25 | 1978-07-27 | 1979-01-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-01-25 | 1982-07-27 | 1983-01-26 | $7700.00 | Window Closed / Lapsed |