Patent US3714754A successfully refreshed from Google Patents.
US3714754A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Vacuumizing system
Assignee: WR Grace and Co Conn
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Filing: 1970-12-14
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Granted: 1973-02-06
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Expires: 1990-12-14
Abstract
Abstract DISCLOSED IS AN APPARATUS AND METHOD FOR VACUUM PACKAGING PRODUCTS IN CONTAINERS SUCH AS BAGS, THE VACUUMIZING APPARATUS INCLUDES A VACUUM CHAMBER AND A VACUUM EXTRACTOR OPERATING INDEPENDENTLY ON THE CONTAINER WITHIN THE VACUUM CHAMBER. IN PREFERRED EMBODIMENTS, THE APPARATUS INCLUDES A CONVEYOR FOR TRANSPORTING THE BAGGED PRODUCTS AND A HOOD MEMBER WHICH, WHEN CONTACTING THE CONVEYOR, FORMS A VACUUMIZING CHAMBER THEREWITH AND THE HOOD MEMBER CONTAINS MEANS FOR CLOSING THE BAG AFTER VACUUMIZING.
Inventors
- 👤 E Holcombe
- 👤 O Calvert
- 👤 W Kessel
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 08:57
CPC Classifications
B; B65; B65B; B65B31/00; B65B31/02; B65B31/024; B65B31/04; B65B31/06
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) | 1976-02-06 | 1976-08-07 | 1977-02-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-02-06 | 1980-08-07 | 1981-02-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-02-06 | 1984-08-07 | 1985-02-06 | $7700.00 | Window Closed / Lapsed |