US3209915A
Expired / Lapsed
US
⏱️ 0.0 years remaining
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Assignee: AIRCRAFT APPLIANCES AND EQUIPMENT Ltd
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Filing: 1962-06-11
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Granted: 1965-10-05
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Expires: 1982-06-11
Abstract
No abstract record available.
Inventors
- 👤 Gutkowski Janusz
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 12:54
CPC Classifications
B; B01; B01D; B01D25/00; B01D25/22; B01D25/26
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
203 words
IN A FILTER HAVING A FILTER BARRIER COMPRISED OF A SERIES OF ANNULAR FILTER ELEMENTS ARRANGED ONE ABOVE THE OTHER TO DISPOSE THEM IN A STACKED ARRANGEMENT, ANNULAR SPACERS FOR SAID FILTER ELEMENTS, SAID SPACERS HAVING UNDULATING SURFACES COMPRISED OF CRESTS AND VALLEYS AND BEING DISPOSED BETWEEN ADJACENT FILTER ELEMENTS TO SEPARATE AND SUPPORT THEM IN SAID STACKED ARRANGEMENT, SAID SPACERS BEING OF TWO TYPES AND ADJACENT SPACERS BEING OF DIFFERENT TYPES, THE SPACERS IN ONE OF SAID TYPES HAVING THEIR CRESTS DISPOSED ANNULARLY AND THE SPACERS IN THE OTHER OF SAID TYPES HAVING THEIR CRESTS DISPOSED RADIALLY WHEREBY SAID CRESTS COINCIDE WITH EACH OTHER AT SUBSTANTIALLY RIGHT ANGLES, AT LEAST SOME OF SAID SPACERS HAVING PASSAGE MEANS THERETHROUGH TO PERMIT THE FLOW OF FLUID BETWEEN SAID ELEMENTS AND THROUGH SAID FILTER BARRIER, THE UNDULATIONS OF SAID SPACERS VARYING IN DEPTH, ALTERNATE SPACERS BEING OF OPPOSITE DEPTH VARIATION TO SUPPORT SAID STACKED ARRANGEMENT, SAID FILTER ELEMENTS BEING CONNECTED ALTERNATELY AT ADJACENT OUTER EDGES AND AT ADJACENT INNER EDGES TO DISPOSE THEM IN A STACKED ARRANGEMENT, SAID PASSAGE MEANS IN SAID SPACERS BEING IN SAID SPACERS THAT HAVE ANNULAR CRESTS AND COMPRISING RADIALLY EXTENDING CUT-OUTS TO PERMIT THE FLOW OF FLUID THROUGH SAID BARRIER.
Claim 2
Dependent Claim
203 words
IN A FILTER HAVING A FILTER BARRIER COMPRISED OF A SERIES OF ANNULAR FILTER ELEMENTS ARRANGED ONE ABOVE THE OTHER TO DISPOSE THEM IN A STACKED ARRANGEMENT, ANNULAR SPACERS FOR SAID FILTER ELEMENTS, SAID SPACERS HAVING UNDULATING SURFACES COMPRISED OF CRESTS AND VALLEYS AND BEING DISPOSED BETWEEN ADJACENT FILTER ELEMENTS TO SEPARATE AND SUPPORT THEM IN SAID STACKED ARRANGEMENT, SAID SPACERS BEING OF TWO TYPES AND ADJACENT SPACERS BEING OF DIFFERENT TYPES, THE SPACERS IN ONE OF SAID TYPES HAVING THEIR CRESTS DISPOSED ANNULARLY AND THE SPACERS IN THE OTHER OF SAID TYPES HAVING THEIR CRESTS DISPOSED RADIALLY WHEREBY SAID CRESTS COINCIDE WITH EACH OTHER AT SUBSTANTIALLY RIGHT ANGLES, AT LEAST SOME OF SAID SPACERS HAVING PASSAGE MEANS THERETHROUGH TO PERMIT THE FLOW OF FLUID BETWEEN SAID ELEMENTS AND THROUGH SAID FILTER BARRIER, THE UNDULATIONS OF SAID SPACERS VARYING IN DEPTH, ALTERNATE SPACERS BEING OF OPPOSITE DEPTH VARIATION TO SUPPORT SAID STACKED ARRANGEMENT, SAID FILTER ELEMENTS BEING CONNECTED ALTERNATELY AT ADJACENT OUTER EDGES AND AT ADJACENT INNER EDGES TO DISPOSE THEM IN A STACKED ARRANGEMENT, SAID PASSAGE MEANS IN SAID SPACERS BEING IN SAID SPACERS THAT HAVE ANNULAR CRESTS AND COMPRISING RADIALLY EXTENDING CUT-OUTS TO PERMIT THE FLOW OF FLUID THROUGH SAID BARRIER.
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) | 1968-10-04 | 1969-04-05 | 1969-10-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-10-04 | 1973-04-05 | 1973-10-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-10-04 | 1977-04-05 | 1977-10-05 | $7700.00 | Window Closed / Lapsed |