Patent US2389854A successfully refreshed from Google Patents.
Patent US3231312A successfully refreshed from Google Patents.
US3231312A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Fluidizing mat for containers
Assignee: Granu Flow Equipment Ltd
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Filing: 1962-04-05
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Granted: 1966-01-25
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Expires: 1982-04-05
Abstract
No abstract record available.
Inventors
- 👤 Paton Hamilton Neil King
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 09:24
CPC Classifications
B; B65; B65G; B65G53/00; B65G53/04; B65G53/16; B65G53/18
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
71 words
A FLUIDIZING UNIT FOR CONTAINERS TO HOLD GRANULAR MATERIAL, COMPRISING A THICK BOTTOM MAT OF RESILIENTLY COMPRESSIBLE POLYURETHANE FOAM MATERIAL EXTENDING CONTINUOUSLY BETWEEN ITS OPPOSITE EDGES AND HAVING INTERCOMMINICATING PORES, MEANS DISPOSED A SUBSTANTIAL DISTANCE BENEATH THE UPPER SURFACE OF SAID MAT COMMUNICATING WITH SUCH PORES TO SUPPLY GAS EXCAPING UPWARD THROUGH SUCH PORES FOR EMANATION OF THE GAS FROM SUBSTANTIALLY THE ENTIRE AREA OF THE UPPER SURFACE OF THE MAT,
Claim 2
Dependent Claim
71 words
A FLUIDIZING UNIT FOR CONTAINERS TO HOLD GRANULAR MATERIAL, COMPRISING A THICK BOTTOM MAT OF RESILIENTLY COMPRESSIBLE POLYURETHANE FOAM MATERIAL EXTENDING CONTINUOUSLY BETWEEN ITS OPPOSITE EDGES AND HAVING INTERCOMMINICATING PORES, MEANS DISPOSED A SUBSTANTIAL DISTANCE BENEATH THE UPPER SURFACE OF SAID MAT COMMUNICATING WITH SUCH PORES TO SUPPLY GAS EXCAPING UPWARD THROUGH SUCH PORES FOR EMANATION OF THE GAS FROM SUBSTANTIALLY THE ENTIRE AREA OF THE UPPER SURFACE OF THE MAT,
References Cited (Backward Citations)
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Cited
US2676851A
Cited
US2730150A
Cited
US2919955A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-01-24 | 1969-07-26 | 1970-01-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-01-24 | 1973-07-26 | 1974-01-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-01-24 | 1977-07-26 | 1978-01-25 | $7700.00 | Window Closed / Lapsed |