Patent US3093581A successfully refreshed from Google Patents.
US3093581A
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High pressure sealing element
Assignee: Pall Corp
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Filing: 1959-08-25
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Granted: 1963-06-11
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Expires: 1979-08-25
Abstract
No abstract record available.
Inventors
- 👤 David B Pall
- 👤 Cordes Harry
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 21:41
CPC Classifications
F; F16; F16J; F16J15/00; F16J15/16; F16J15/18; F16J15/20; F16J15/02; F16J15/06; F16J15/10; F16J15/12; F16K; F16K27/00; F16K27/08
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
132 words
A FILTER UNIT COMPRISING, IN COMBINATION, A HEAD HAVING INLET AND OUTLET PASSAGES, A FILTER BOWL SECURED TO THE HEAD INCLUDING A FILTER UNIT, AND, DISPOSED IN A FIXED GAP BETWEEN THE FILTER BOWL AND THE HEAD, A SEALING ELEMENT COMPRISING, IN COMBINATION, A STAINLESS STEEL SHEET SURFACED WITH A COATING NOT EXCEEDING 0.010 INCH IN THICKNESS OF A MATERIAL SOFTER THAN THE STEEL SHEET, THE COATING SERVING AS A SEALING SURFACE FOR THE ELEMENT IN THE GAP, THE ELEMENT HAVING A FLATTENED BASED PORTION CONSITUTING A PERIPHERY THEREOF AND FROM WHICH EXTEND TWO DIVERGENT FLANGES, EACH FLANGE HAVING A FLAT SURFACE AND EXTENDING FROM THE BASE PORTION AT AN ENCLOSED ANGLE GREATER THAN 90*, AND A CORE OF RESILIENT MATERIAL ENCLOSED AT LEAST PARTIALLY BY THE BASE PORTION AND THE FLANGES.
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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) | 1966-06-10 | 1966-12-10 | 1967-06-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-06-10 | 1970-12-10 | 1971-06-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-06-10 | 1974-12-10 | 1975-06-11 | $7700.00 | Window Closed / Lapsed |