US3102014A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Air filter curtain
Assignee: ELECTRO AIR CLEANER Co IN
•
Filing: 1961-05-03
•
Granted: 1963-08-27
•
Expires: 1981-05-03
Abstract
No abstract record available.
Inventors
- 👤 Paul W Aitkenhead
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 22:49
CPC Classifications
F; F24; F24F; F24F13/00; F24F13/28; B; B01; B01D; B01D39/00; B01D39/14; B01D39/20; B01D39/2003; B01D39/2017; B01D46/00; B01D46/18
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
157 words
A FILTER CURTAIN OF FINE FIBERS TO BE DRAWN ACROSS A PASSAGE THROUGH WHICH THE AIR TO BE CLEANED TRAVELS IN ONE DIRECTION WHICH CURTAIN CONSISTS OF A MAT MADE OF A PLURALITY OF LAYERS OF GLASS FIBERS EXTENDING GENERALLY LONGITUDINAL, EACH LAYER BEING DEFINED BY THE RELATIVELY STRAIGHT GLASS FIBERS LYING IN A CRISS CROSS PATTERN FORMING AN ACUTE ANGLE WITH EACH OTHER THE MAJOR PORTION OF THE GLASS FIBERS BEING ARCUATE AND DISPERSED IN ALL DIRECTIONS TO INTERCONNECT THE CRISS CROSS PATTERN DEFINING THE ADJACENT LAYERS OF THE MAT, THE DEFINED LAYERS OF GLASS FIBERS BECOMING PROGRESSIVELY CLOSER TOGETHER FROM THE AIR ENTRY SIDE OF THE MAT TO THE AIR DISCHARGE SIDE OF THE MAT TO PROVIDE A PROGRESSIVE INCREASE IN THE DENSITY OF THE GLASS FIBERS THROUGH THE MAT, A FRAME ENCIRCLING THE PASSAGE, GUIDE MEANS SUPPORTED BY SAID FRAME TO CHANNEL THE CURTAIN AS IT PASSES ACROSS THE PASSAGE, A TRANSVERSELY DISPOSED STA-
Claim 2
Dependent Claim
157 words
A FILTER CURTAIN OF FINE FIBERS TO BE DRAWN ACROSS A PASSAGE THROUGH WHICH THE AIR TO BE CLEANED TRAVELS IN ONE DIRECTION WHICH CURTAIN CONSISTS OF A MAT MADE OF A PLURALITY OF LAYERS OF GLASS FIBERS EXTENDING GENERALLY LONGITUDINAL, EACH LAYER BEING DEFINED BY THE RELATIVELY STRAIGHT GLASS FIBERS LYING IN A CRISS CROSS PATTERN FORMING AN ACUTE ANGLE WITH EACH OTHER THE MAJOR PORTION OF THE GLASS FIBERS BEING ARCUATE AND DISPERSED IN ALL DIRECTIONS TO INTERCONNECT THE CRISS CROSS PATTERN DEFINING THE ADJACENT LAYERS OF THE MAT, THE DEFINED LAYERS OF GLASS FIBERS BECOMING PROGRESSIVELY CLOSER TOGETHER FROM THE AIR ENTRY SIDE OF THE MAT TO THE AIR DISCHARGE SIDE OF THE MAT TO PROVIDE A PROGRESSIVE INCREASE IN THE DENSITY OF THE GLASS FIBERS THROUGH THE MAT, A FRAME ENCIRCLING THE PASSAGE, GUIDE MEANS SUPPORTED BY SAID FRAME TO CHANNEL THE CURTAIN AS IT PASSES ACROSS THE PASSAGE, A TRANSVERSELY DISPOSED STA-
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1966-08-26 | 1967-02-25 | 1967-08-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-08-26 | 1971-02-25 | 1971-08-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-08-26 | 1975-02-25 | 1975-08-27 | $7700.00 | Window Closed / Lapsed |