US3033783A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Filter and method of producing same
Assignee: Permanent Filter Corp
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Filing: 1958-04-07
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Granted: 1962-05-08
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Expires: 1978-04-07
Abstract
No abstract record available.
Inventors
- 👤 Robert A Lubben
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 03:51
CPC Classifications
B; B01; B01D; B01D29/00; B01D29/11; B01D29/111; B01D29/13; B01D29/15; B01D29/31; B01D29/33; Y; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/496; Y10T29/49604; Y10T29/49826; Y10T29/49908; Y10T29/49925; Y10T29/49927; Y10T29/49929
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
156 words
THE METHOD OF FORMING A FILTER STRUCTURE HAVING A METAL END-CAP WITH A PERIPHERAL RECESS OF A SHAPE AND WIDTH CORRESPONDING TO THE CROSS-SECTION OF ONE END OF A GENERALLY TUBULARLY-SHAPED SINTERED METAL ELEMENT AND ALSO HAVING A CENTRAL OPENING EXTENDING THERETHROUGH, WHICH COMPRISES POSITIONING THE SINTERED METAL TUBULAR ELEMENT WITHIN THE RECESS OF THE END-CAP, SUPPORTING THE END-CAP FOR HOLDING THE ASSEMBLED COMPONENTS, POSITIONING A MANDREL INTERNALLY OF THE END-CAP AND THE TUBULAR MEMBER TO BEAR UPON THE INNER WALL OF THE RECESS IN WHICH THE SINTERED ELEMENT IS SUPPORTED, FORCING THE OUTER RECESS WELL INWARDLY AGAINST THE RECESS-LOCATED END OF THE SINTERED ELEMENT AGAINST THE MANDREEL AS A FIXED ELEMENT TO FORM AN INWARDLY EXTENDING BEADING ABOUT THE EXTERNAL SURFACE OF THE CAP SUBSTANTIALLY TO LOCK THE SINTERED METAL ELEMENT THERETO WITHIN THE RECESS AND THEN RESISTANCE WELDING THE SINTEREED ELEMENT WITHIN THE RECESS OF THE END-CAP PERMANENTLY TO SECURE THE TWO ELEMENTS TOGETHER.
Claim 2
Independent Claim
156 words
THE METHOD OF FORMING A FILTER STRUCTURE HAVING A METAL END-CAP WITH A PERIPHERAL RECESS OF A SHAPE AND WIDTH CORRESPONDING TO THE CROSS-SECTION OF ONE END OF A GENERALLY TUBULARLY-SHAPED SINTERED METAL ELEMENT AND ALSO HAVING A CENTRAL OPENING EXTENDING THERETHROUGH, WHICH COMPRISES POSITIONING THE SINTERED METAL TUBULAR ELEMENT WITHIN THE RECESS OF THE END-CAP, SUPPORTING THE END-CAP FOR HOLDING THE ASSEMBLED COMPONENTS, POSITIONING A MANDREL INTERNALLY OF THE END-CAP AND THE TUBULAR MEMBER TO BEAR UPON THE INNER WALL OF THE RECESS IN WHICH THE SINTERED ELEMENT IS SUPPORTED, FORCING THE OUTER RECESS WELL INWARDLY AGAINST THE RECESS-LOCATED END OF THE SINTERED ELEMENT AGAINST THE MANDREEL AS A FIXED ELEMENT TO FORM AN INWARDLY EXTENDING BEADING ABOUT THE EXTERNAL SURFACE OF THE CAP SUBSTANTIALLY TO LOCK THE SINTERED METAL ELEMENT THERETO WITHIN THE RECESS AND THEN RESISTANCE WELDING THE SINTEREED ELEMENT WITHIN THE RECESS OF THE END-CAP PERMANENTLY TO SECURE THE TWO ELEMENTS TOGETHER.
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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) | 1965-05-07 | 1965-11-06 | 1966-05-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-05-07 | 1969-11-06 | 1970-05-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-05-07 | 1973-11-06 | 1974-05-08 | $7700.00 | Window Closed / Lapsed |