US3082587A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Air filter
Assignee: Electrolux AB
•
Filing: 1960-02-18
•
Granted: 1963-03-26
•
Expires: 1980-02-18
Abstract
No abstract record available.
Inventors
- 👤 Brimberg Torsten
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 12:36
CPC Classifications
A; A47; A47L; A47L9/00; A47L9/10; A47L9/12; A47L9/122; Y; Y10; Y10S; Y10S264/00; Y10S264/48; Y10S264/76
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
138 words
AN ARTICLE OF THE CLASS DESCRIBED COMPRISING A BODY OF AIR-IMPERMEABLE MATERIAL INCLUDING RIB STRUCTURE AND A RIM AT ITS PERIPHERY WHICH IS FIXED THERETO, THE INNER SURFACE OF SAID RIM HAVING A PAIR OF WALLS WHICH ARE ADJACENT TO ONE ANOTHER AT THEIR INNER EDGES AND SLOPE OUTWARD FROM THEIR INNER EDGES IN A DIRECTION TOWARD THE OUTER PERIPHERY OF THE RIM AND FORM AN ANGLE THEREBETWEEN WHICH IS GREATER THAN 90* AND LESS THAN 180*, SAID RIB STRUCTURE INCLUDING RIBS SPLIT IN A LENGTHWISE DIRECTION TO PROVIDE RIB SECTIONS WITH THEIR INNER SURFACES BACK TO BACK, AND SHEETING OF AIR-PERMEABLE MATERIAL HELD BETWEEN SAID RIB SECTIONS, SAID SHEETING HAVING A PAIR OF OUTER PERIPHERAL EDGE PORTIONS, EACH OF SAID OUTER PERIPHERAL EDGE PORTIONS OVERLYING A DIFFERENT ONE OF SAID OUTWARDLY SLOPING WALLS AND BEING FIXED THERETO.
Claim 2
Dependent Claim
138 words
AN ARTICLE OF THE CLASS DESCRIBED COMPRISING A BODY OF AIR-IMPERMEABLE MATERIAL INCLUDING RIB STRUCTURE AND A RIM AT ITS PERIPHERY WHICH IS FIXED THERETO, THE INNER SURFACE OF SAID RIM HAVING A PAIR OF WALLS WHICH ARE ADJACENT TO ONE ANOTHER AT THEIR INNER EDGES AND SLOPE OUTWARD FROM THEIR INNER EDGES IN A DIRECTION TOWARD THE OUTER PERIPHERY OF THE RIM AND FORM AN ANGLE THEREBETWEEN WHICH IS GREATER THAN 90* AND LESS THAN 180*, SAID RIB STRUCTURE INCLUDING RIBS SPLIT IN A LENGTHWISE DIRECTION TO PROVIDE RIB SECTIONS WITH THEIR INNER SURFACES BACK TO BACK, AND SHEETING OF AIR-PERMEABLE MATERIAL HELD BETWEEN SAID RIB SECTIONS, SAID SHEETING HAVING A PAIR OF OUTER PERIPHERAL EDGE PORTIONS, EACH OF SAID OUTER PERIPHERAL EDGE PORTIONS OVERLYING A DIFFERENT ONE OF SAID OUTWARDLY SLOPING WALLS AND BEING FIXED THERETO.
References Cited (Backward Citations)
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FR69001E
Cited
US2784132A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1966-03-25 | 1966-09-24 | 1967-03-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-03-25 | 1970-09-24 | 1971-03-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-03-25 | 1974-09-24 | 1975-03-26 | $7700.00 | Window Closed / Lapsed |