Patent US2200069A successfully refreshed from Google Patents.
Patent US3744222A successfully refreshed from Google Patents.
US3744222A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Corrugated board paint filter
Assignee: Individual
•
Filing: 1970-12-16
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Granted: 1973-07-10
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Expires: 1990-12-16
Abstract
Abstract A filter for a paint spray booth comprising three walls of single face corrugated board having holes in each wall offset from holes in an adjacent wall; a rear wall has forwardly extending sides, a second wall within the sides has forwardly and rearwardly directed spacer flaps, and a third wall is supported at the forward edges of the sides.
Inventors
- 👤 A Delao
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 19:40
CPC Classifications
B; B44; B44D; B44D3/00; B44D3/06; B44D3/10; B01; B01D; B01D45/00; B01D45/04; B01D45/08; Y; Y10; Y10S; Y10S55/00; Y10S55/31; Y10T; Y10T428/00; Y10T428/24; Y10T428/24628; Y10T428/24669; Y10T428/24694; Y10T428/24711; Y10T428/24727
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
134 words
A filter made essentially from paper comprising: a plurality of spaced apart walls each comprising a corrugated sheet, and a flat paper liner sheet, holes extending through each said wall each being defined by aligned holes in the said corrugated and liner sheets for the passage of gaseous medium through said walls, by passage through the said holes therein, the holes in one wall being offset from the holes in the wall adjacent thereto to cause deflection of gaseous medium between an upstream wall and a down stream wall and the depositing of particulate material carried by said gaseous medium onto a said wall, and frame means for holding said walls in said spaced apart relationship to each other and for defining a peripherally bounded chamber between said walls, said chamber being substantially unobstructed.
Claim 2
Dependent Claim
134 words
A filter made essentially from paper comprising: a plurality of spaced apart walls each comprising a corrugated sheet, and a flat paper liner sheet, holes extending through each said wall each being defined by aligned holes in the said corrugated and liner sheets for the passage of gaseous medium through said walls, by passage through the said holes therein, the holes in one wall being offset from the holes in the wall adjacent thereto to cause deflection of gaseous medium between an upstream wall and a down stream wall and the depositing of particulate material carried by said gaseous medium onto a said wall, and frame means for holding said walls in said spaced apart relationship to each other and for defining a peripherally bounded chamber between said walls, said chamber being substantially unobstructed.
Claim 3
Dependent Claim
24 words
The filter of claim 1, wherein the corrugated sheet of one wall is in facing relationship to the liner sheet of an adjacent wall.
Claim 4
Dependent Claim
44 words
The filter of claim 1, one said wall being a rear wall of generally rectangular plan form, said frame means defined by said rear wall having four sides integral therewith and extending perpendicularly thereto, a second said wall being supported by said four sides.
Claim 5
Dependent Claim
41 words
The filter of claim 3, said second wall being of similar size and plan form to said rear wall, said second wall having a pair of integral spacer flaps extending from opposite side margins thereof toward and engaging said rear wall.
Claim 6
Dependent Claim
61 words
The filter of claim 4, said second wall having a second pair of integral spacer flaps extending from the other opposite side margins thereof oppositely to said first pair of spacer flaps, and a third wall parallel to said first two walls supported by said four sides of said rear wall, said third wall engaging said second pair of spacer flaps.
Claim 7
Dependent Claim
26 words
The filter of claim 5, wherein the corrugated paper sheet of the rear wall is in facing relationship to the liner sheet of the second wall.
Claim 8
Dependent Claim
26 words
The filter of claim 5, wherein the corrugated paper sheet of the second wall is in facing relationship to the liner sheet of the third wall.
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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) | 1976-07-09 | 1977-01-08 | 1977-07-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-07-09 | 1981-01-08 | 1981-07-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-07-09 | 1985-01-08 | 1985-07-10 | $7700.00 | Window Closed / Lapsed |