Patent US3407576A successfully refreshed from Google Patents.
US3407576A
Expired / Lapsed
US
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Self-supporting filter element
Assignee: G S STAUNTON AND CO Inc
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Filing: 1966-06-14
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Granted: 1968-10-29
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Expires: 1986-06-14
Abstract
No abstract record available.
Inventors
- 👤 Richard T Staunton
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 06:51
CPC Classifications
F; F24; F24F; F24F13/00; F24F13/28; B; B01; B01D; B01D46/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
194 words
A SELF-SUPPORTING FILTER ELEMENT COMPRISING: A BATT OF FLEXIBLE AND NONSELF-SUPPORTING FILTER MATERIAL; A SUPPORTING BORDER FRAME EXTENDING AROUND THE PERIPHERAL EDGE OF THE SURFACE OF SAID BATT AND FORMED OF A THERMOPLASTIC MATERIAL DIFFUSED INTO AND FILLING THE INTERSTICES IN THE PERIPHERAL PORTION OF SAID BATT IN CONTACT THEREWITH, SAID PORTIONS OF SAID BATT EXTENDING SUBSTANTIALLY TO THE OUTER EDGES OF SAID BORDER FRAME AND BEING COMPRESSED TO PREVENT FLOW THERETHROUGH; AND AN INTERMEDIATE FRAME FORMED INTEGRALLY WITH AND EXTENDING BETWEEN ELEMENTS OF SAID BORDER FRAME AND FORMED OF THE SAME MATERIAL AS SAID BORDER FRAME, SAID INTERMEDIATE FRAME DIFFUSING INTO AND FILLING THE INTERSTICES IN THE PORTION OF SAID BATT IN CONTACT THEREWITH, SAID LAST NAMED PORTIONS OF SAID BATT BEING COMPRESSED TO PREVENT FLOW THERETHROUGH; THE PARTS OF SAID FILTER ELEMENT DEFINED BY ADJACENT ELEMENTS OF SAID BORDER FRAME AND SAID INTERMEDIATE FRAME AND BETWEEN ADJACENT ELEMENTS OF SAID INTERMEDIATE FRAME AND OTHER ELEMENTS OF SAID INTERMEDIATE FRAME BEING COMPLETE SELF-SUPPORTING FILTER ELEMENTS SUCH THAT PARTS OF SAID SELF-SUPPORTING FILTER ELEMENT OUTWARDLY OF SAID ADJACENT ELEMENTS OF SAID BORDER FRAME AND SAID INTERMEDIATE FRAME ARE REMOVABLE TO CHANGE THE DIMENSIONS THEREOF.
Claim 2
Dependent Claim
194 words
A SELF-SUPPORTING FILTER ELEMENT COMPRISING: A BATT OF FLEXIBLE AND NONSELF-SUPPORTING FILTER MATERIAL; A SUPPORTING BORDER FRAME EXTENDING AROUND THE PERIPHERAL EDGE OF THE SURFACE OF SAID BATT AND FORMED OF A THERMOPLASTIC MATERIAL DIFFUSED INTO AND FILLING THE INTERSTICES IN THE PERIPHERAL PORTION OF SAID BATT IN CONTACT THEREWITH, SAID PORTIONS OF SAID BATT EXTENDING SUBSTANTIALLY TO THE OUTER EDGES OF SAID BORDER FRAME AND BEING COMPRESSED TO PREVENT FLOW THERETHROUGH; AND AN INTERMEDIATE FRAME FORMED INTEGRALLY WITH AND EXTENDING BETWEEN ELEMENTS OF SAID BORDER FRAME AND FORMED OF THE SAME MATERIAL AS SAID BORDER FRAME, SAID INTERMEDIATE FRAME DIFFUSING INTO AND FILLING THE INTERSTICES IN THE PORTION OF SAID BATT IN CONTACT THEREWITH, SAID LAST NAMED PORTIONS OF SAID BATT BEING COMPRESSED TO PREVENT FLOW THERETHROUGH; THE PARTS OF SAID FILTER ELEMENT DEFINED BY ADJACENT ELEMENTS OF SAID BORDER FRAME AND SAID INTERMEDIATE FRAME AND BETWEEN ADJACENT ELEMENTS OF SAID INTERMEDIATE FRAME AND OTHER ELEMENTS OF SAID INTERMEDIATE FRAME BEING COMPLETE SELF-SUPPORTING FILTER ELEMENTS SUCH THAT PARTS OF SAID SELF-SUPPORTING FILTER ELEMENT OUTWARDLY OF SAID ADJACENT ELEMENTS OF SAID BORDER FRAME AND SAID INTERMEDIATE FRAME ARE REMOVABLE TO CHANGE THE DIMENSIONS THEREOF.
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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) | 1971-10-29 | 1972-04-29 | 1972-10-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-10-29 | 1976-04-29 | 1976-10-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-10-29 | 1980-04-29 | 1980-10-29 | $7700.00 | Window Closed / Lapsed |