US3186149A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Filter box assembly
Assignee: Flanders Filters Inc
•
Filing: 1962-04-19
•
Granted: 1965-06-01
•
Expires: 1982-04-19
Abstract
No abstract record available.
Inventors
- 👤 Joseph G Ayers
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 14:07
CPC Classifications
B; B01; B01D; B01D46/00; B01D46/10; B01D46/12
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
125 words
A FILTER BOX ASSEMBLY COMPRISING A PLURALITY OF SIMILAR AND STACKED FILTER BOXES, EACH FILTER BOX HOLDING GRANULAR FILTER MATERIAL AND ADAPTED TO BE ASSEMBLED IN STACKED RELATIONSHIP WITH OTHER SIMILAR FILTER BOXES IN A STREAM OF GASEOUS MATERIAL TO REMOVE IMPURITIES THEREFROM COMPRISING FIRST AND SECOND COMPLEMENTARY BOX MEMBERS HAVING TELESCOPIC ENGAGEMENT WITH EACH OTHER AND EACH FORMED OF A TRANSVERSE END PANEL AND PERIPHERAL SIDE WALLS DISPOSED SUBSTANTIALLY AT RIGHT ANGLES THERETO WITH THE SIDE WALLS OF ONE MEMBER BEING SPACED A SLIGHTLY GREATER DISTANCE APART THAN THE SIDE WALLS OF THE OTHER MEMBER SO AS TO HAVE OVERLAPPING SLIDING ENGAGEMENT WITH THE SIDE WALLS OF THE OTHER MEMBER AND THE SIDE WALLS OF ONE MEMBER HAVING RECESSES FORMED THEREIN WHILE THE CORRE-
Claim 2
Dependent Claim
125 words
A FILTER BOX ASSEMBLY COMPRISING A PLURALITY OF SIMILAR AND STACKED FILTER BOXES, EACH FILTER BOX HOLDING GRANULAR FILTER MATERIAL AND ADAPTED TO BE ASSEMBLED IN STACKED RELATIONSHIP WITH OTHER SIMILAR FILTER BOXES IN A STREAM OF GASEOUS MATERIAL TO REMOVE IMPURITIES THEREFROM COMPRISING FIRST AND SECOND COMPLEMENTARY BOX MEMBERS HAVING TELESCOPIC ENGAGEMENT WITH EACH OTHER AND EACH FORMED OF A TRANSVERSE END PANEL AND PERIPHERAL SIDE WALLS DISPOSED SUBSTANTIALLY AT RIGHT ANGLES THERETO WITH THE SIDE WALLS OF ONE MEMBER BEING SPACED A SLIGHTLY GREATER DISTANCE APART THAN THE SIDE WALLS OF THE OTHER MEMBER SO AS TO HAVE OVERLAPPING SLIDING ENGAGEMENT WITH THE SIDE WALLS OF THE OTHER MEMBER AND THE SIDE WALLS OF ONE MEMBER HAVING RECESSES FORMED THEREIN WHILE THE CORRE-
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1968-05-31 | 1968-11-30 | 1969-06-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-05-31 | 1972-11-30 | 1973-06-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-05-31 | 1976-11-30 | 1977-06-01 | $7700.00 | Window Closed / Lapsed |