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Abstract
Abstract AN IMPROVEMENT IN FILTER ASSEMBLIES FOR USE IN AIR TREATMENT MACHINES, SUCH AS AIR CONDITIONERS AND THE LIKE. THE ASSEMBLY INCLUDES A HONEYCOMB STRUCTURE HAVING A PLURALITY OF PASSAGES THEREIN AND ALIGNED IN THE DIRECTION OF AIR FLOW. SOME OF THE PASSAGES IN THE HONEYCOMB STRUCTURE ARE FILLED WITH GRANULAR FILTER MATERIAL, SUCH AS ACTIVATED CARBON, AND OTHERS OF THE PASSAGES ARE UNFILLED. A MEMBER ADAPTED TO PERMIT AIR FLOW THERETHROUGH IS SECURED ADJACENT TO THE HONEYCOMB STRUCTURE AT EACH SURFACE THEREOF TO RETAIN THE GRANULAR MATERIAL IN THE PASSAGES. AN ADDITIONAL LAYER OF OPEN CELL FILTER MATERIAL MAY BE SECURED ADJACENT THE DOWNSTREAM MEMBER FOR ADDITIONAL FILTERING AS NECESSARY. THE ENTIRE ASSEMBLY IS ENCLOSED IN A BORDER FRAME STRUCTURE, AND MAY BE FORMED OF THROW-AWAY MATERIALS OR MAY BE MADE OF PERMANENT MATERIALS.
Inventors
- 👤 Richard T Staunton
Bibliographic Details
Claims Analysis
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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) | 1974-03-08 | 1974-09-07 | 1975-03-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-03-08 | 1978-09-07 | 1979-03-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-03-08 | 1982-09-07 | 1983-03-09 | $7700.00 | Window Closed / Lapsed |