US3165472A
Expired / Lapsed
US
⏱️ 0.0 years remaining
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Assignee: STONE FILTER Corp
•
Filing: 1960-06-23
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Granted: 1965-01-12
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Expires: 1980-06-23
Abstract
No abstract record available.
Inventors
- 👤 Southwick W Briggs
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 16:27
CPC Classifications
B; B01; B01D; B01D27/00; B01D27/04; B01D27/06; B01D29/00; B01D29/11; B01D29/13; B01D29/15; B01D29/21; B01D37/00; B01D37/02
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
72 words
A FILTER COMPRISING A PERMEABLE IMPREGNATED PAPER FILTER ELEMENT HAVING AXIAL PLEATS DEFINING A PLURALITY OF INNER AND OUTER PEAKS, SAID OUTER PEAKS BEING SPACED APART AND LYING SUBSTANTIALLY IN A CYLINDER, A PERMEABLE CORE DISPOSED WITHIN SAID ELEMENT IN CONTACT WITH SAID INNER PEAKS, A PERMEABLE ANNULAR COVER MEMBER EMBRACING SAID OUTER PEAKS, AND A LAYER OF MUTUALLY FREE LOOSELY ARRANGED TEXTILE FIBERS DISPOSED BETWEEN SAID ELEMENT AND SAID COVER MEMBER.
Claim 2
Dependent Claim
72 words
A FILTER COMPRISING A PERMEABLE IMPREGNATED PAPER FILTER ELEMENT HAVING AXIAL PLEATS DEFINING A PLURALITY OF INNER AND OUTER PEAKS, SAID OUTER PEAKS BEING SPACED APART AND LYING SUBSTANTIALLY IN A CYLINDER, A PERMEABLE CORE DISPOSED WITHIN SAID ELEMENT IN CONTACT WITH SAID INNER PEAKS, A PERMEABLE ANNULAR COVER MEMBER EMBRACING SAID OUTER PEAKS, AND A LAYER OF MUTUALLY FREE LOOSELY ARRANGED TEXTILE FIBERS DISPOSED BETWEEN SAID ELEMENT AND SAID COVER MEMBER.
References Cited (Backward Citations)
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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) | 1968-01-12 | 1968-07-13 | 1969-01-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-01-12 | 1972-07-13 | 1973-01-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-01-12 | 1976-07-13 | 1977-01-12 | $7700.00 | Window Closed / Lapsed |