Patent EP0481447A2 successfully refreshed from Google Patents.
Patent US3341365A successfully refreshed from Google Patents.
US3341365A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of cleaning granular filter material
Assignee: —
•
Filing: —
•
Granted: 1967-09-12
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Expires: 1984-09-12
Abstract
No abstract record available.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 08:15
CPC Classifications
B; B01; B01J; B01J8/00; B01J8/18; B01J8/20; B01D; B01D46/00; B01D46/66; B01D46/70; B01D46/71; B01D46/74; B01D46/76; B08; B08B; B08B7/00; B08B7/02
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
91 words
METHOD OF CLEANING DUST FROM GRANULAR FILTER MATERIAL SPREAD ON AT LEAST ONE GRID SURFACE IN A MOVABLE BOX, COMPRISING SHAKING THE BOX BY ROTATING AN UNBALANCED WEIGHT ATTACHED TO SAID BOX IN ONE DIRECTION IN A SUBSTANTIALLY VERTICAL PLANE TO SHIFT AND PILE UP SAID MATERIAL AGAINST ONE SIDE OF THE BOX, THEN REVERSING THE DIRECTION OF ROTATION OF SAID WEIGHT TO SHIFT AND LEVEL SAID MATERIAL, AND SIMULTANEOUSLY WITH SAID SHAKING BLOWING AIR THROUGH SAID MATERIAL TO REMOVE DUST LOOSENED BY THE SHIFTING OF SAID MATERIAL IN SAID BOX.
Claim 2
Dependent Claim
91 words
METHOD OF CLEANING DUST FROM GRANULAR FILTER MATERIAL SPREAD ON AT LEAST ONE GRID SURFACE IN A MOVABLE BOX, COMPRISING SHAKING THE BOX BY ROTATING AN UNBALANCED WEIGHT ATTACHED TO SAID BOX IN ONE DIRECTION IN A SUBSTANTIALLY VERTICAL PLANE TO SHIFT AND PILE UP SAID MATERIAL AGAINST ONE SIDE OF THE BOX, THEN REVERSING THE DIRECTION OF ROTATION OF SAID WEIGHT TO SHIFT AND LEVEL SAID MATERIAL, AND SIMULTANEOUSLY WITH SAID SHAKING BLOWING AIR THROUGH SAID MATERIAL TO REMOVE DUST LOOSENED BY THE SHIFTING OF SAID MATERIAL IN SAID BOX.
References Cited (Backward Citations)
US2222776A
Cited
GB554192A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1970-09-11 | 1971-03-13 | 1971-09-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-09-11 | 1975-03-13 | 1975-09-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-09-11 | 1979-03-13 | 1979-09-12 | $7700.00 | Window Closed / Lapsed |