Patent US3293833A successfully refreshed from Google Patents.
US3293833A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Pleated filter
Assignee: Cambridge Filter Corp
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Filing: 1963-02-28
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Granted: 1966-12-27
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Expires: 1983-02-28
Abstract
No abstract record available.
Inventors
- 👤 Barany George
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 09:40
CPC Classifications
B; B01; B01D; B01D46/00; B01D46/52; B01D46/521; B01D46/523; B01D29/00; B01D29/01; B01D29/012; B01D29/05; B01D29/07; B01D46/0001; B01D46/10; B01D46/12; B01D46/121; B01D2201/00; B01D2201/12
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
156 words
IN FILTER CONSTRUCTION ADAPTED TO FILTER SOLID AND LIQUID PARTICLES FROM GASES AND VAPORS, THE COMBINATION OF FRAME WORK FORMING A PASSAGE FOR GASEOUS OR VAPOR MEDIUM, FILTER MATERIAL ARRANGED IN PLEAT FORMATION ACROSS THE PASSAGE TO FILTER SAID GASEOUS OR VAPOR MEDIUM PASSING ALONG THE PASSAGE, CORRUGATED SPACING MEMBERS SEPARATING THE PLEATS OF SAID MATERIAL, THE CORRUGATION OF EACH MEMBER FORMING CHANNELS THROUGH WHICH MEDIUM FLOWS CONTIGUOUS TO THE PLEATS OF THE FILTER MATERIAL, AT LEAST A WALL OF THE CHANNELS BEING FORMED BY THE FILTER MATERIAL, SAID CORRUGATIONS BEING OF V CONFIGURATION AND TRANSFORMING FROM LARGE V SECTION CORRUGATIONS ALONG ONE EDGE WITH FLAT SIDES INTO A GREATER NUMBER OF SMALLER CORRUGATIONS ALONG THE OTHER EDGE, THE APICES OF THE LARGE CORRUGATIONS EXTENDING CONTINUOUSLY ACROSS THE MEMBERS TO FORM APICES OF CERTAIN OF THE SMALLER CORRUGATIONS, AND THE APICES OF THE REMAINING SMALLER CORRUGATIONS EXTENDING TO A POINT SHORT OF THE LARGE CORRUGATION EDGE.
Claim 2
Dependent Claim
156 words
IN FILTER CONSTRUCTION ADAPTED TO FILTER SOLID AND LIQUID PARTICLES FROM GASES AND VAPORS, THE COMBINATION OF FRAME WORK FORMING A PASSAGE FOR GASEOUS OR VAPOR MEDIUM, FILTER MATERIAL ARRANGED IN PLEAT FORMATION ACROSS THE PASSAGE TO FILTER SAID GASEOUS OR VAPOR MEDIUM PASSING ALONG THE PASSAGE, CORRUGATED SPACING MEMBERS SEPARATING THE PLEATS OF SAID MATERIAL, THE CORRUGATION OF EACH MEMBER FORMING CHANNELS THROUGH WHICH MEDIUM FLOWS CONTIGUOUS TO THE PLEATS OF THE FILTER MATERIAL, AT LEAST A WALL OF THE CHANNELS BEING FORMED BY THE FILTER MATERIAL, SAID CORRUGATIONS BEING OF V CONFIGURATION AND TRANSFORMING FROM LARGE V SECTION CORRUGATIONS ALONG ONE EDGE WITH FLAT SIDES INTO A GREATER NUMBER OF SMALLER CORRUGATIONS ALONG THE OTHER EDGE, THE APICES OF THE LARGE CORRUGATIONS EXTENDING CONTINUOUSLY ACROSS THE MEMBERS TO FORM APICES OF CERTAIN OF THE SMALLER CORRUGATIONS, AND THE APICES OF THE REMAINING SMALLER CORRUGATIONS EXTENDING TO A POINT SHORT OF THE LARGE CORRUGATION EDGE.
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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) | 1969-12-26 | 1970-06-27 | 1970-12-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-12-26 | 1974-06-27 | 1974-12-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-12-26 | 1978-06-27 | 1978-12-27 | $7700.00 | Window Closed / Lapsed |