US4610706A
Expired / Lapsed
US
⏱️ 0.0 years remaining
HEPA filter with integral separators
Assignee: Individual
•
Filing: 1984-09-25
•
Granted: 1986-09-09
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Expires: 2004-09-25
Abstract
Abstract A HEPA filter is disclosed which includes an outer frame which encloses a filter assembly that includes a plurality of horizontally corrugated panels with alternate flat integral separator panels folded therebetween all formed from a continuous sheet or strip of filter media, and with vertical crease lines providing for folding the panels.
Inventors
- 👤 Alexander G. Nesher
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 02:51
CPC Classifications
B; B01; B01D; B01D46/00; B01D46/52; B01D46/521; B01D46/523; B01D46/10
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
87 words
A HEPA filter with provides laminar and turbulence free air flow which comprises an outer frame, a filter assembly carried within said frame, said filter assembly is of filtering material in continuous strip form with a continuous succession of alternating flat panels and corrugated panels of the same size, said corrugated panels having V-shaped horizontal corrugations extending across the panels and vertical margins extending along said corrugations, and with crease means between the flat panels and the vertical margins of the corrugated panels for folding said panels.
Claim 2
Dependent Claim
87 words
A HEPA filter with provides laminar and turbulence free air flow which comprises an outer frame, a filter assembly carried within said frame, said filter assembly is of filtering material in continuous strip form with a continuous succession of alternating flat panels and corrugated panels of the same size, said corrugated panels having V-shaped horizontal corrugations extending across the panels and vertical margins extending along said corrugations, and with crease means between the flat panels and the vertical margins of the corrugated panels for folding said panels.
Claim 3
Dependent Claim
17 words
A filter as defined in claim 1 in which said crease means comprise two vertical crease lines.
Claim 4
Dependent Claim
31 words
A filter as defined in claim 1 in which said crease means are disposed in flat portions of said filter element and are spaced from each other by the corrugated panels.
Claim 5
Dependent Claim
20 words
A filter as defined in claim 1 in which said corrugated panels are provided with horizontal margins along said corrugations.
Claim 6
Dependent Claim
16 words
A filter as defined in claim 1 in which said filter assembly is of fiber glass.
Claim 7
Dependent Claim
26 words
A filter as defined in claim 1 in which said filter assembly consists of a continuous sheet of expanded fiber glass with an increased filtering surface.
Claim 8
Dependent Claim
17 words
A filter as defined in claim 1 in which said filter assembly is cemented to said frame.
References Cited (Backward Citations)
FR745466A
Cited
GB798765A
Cited
GB840757A
Cited
US3280985A
Cited
US3386227A
Cited
US3410062A
Cited
US3531920A
Cited
US3799354A
Cited
US4199387A
Cited
US4310419A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1989-09-08 | 1990-03-10 | 1990-09-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1993-09-08 | 1994-03-10 | 1994-09-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1997-09-08 | 1998-03-10 | 1998-09-09 | $7700.00 | Window Closed / Lapsed |