US3319793A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Cord wound filter element
Assignee: Individual
•
Filing: 1965-06-08
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Granted: 1967-05-16
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Expires: 1985-06-08
Abstract
No abstract record available.
Inventors
- 👤 Jr Charles A Miller
- 👤 Joseph B Masaschi
- 👤 Jr Robert W Miller
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 07:09
CPC Classifications
B; B01; B01D; B01D29/00; B01D29/11; B01D29/13; B01D29/15; B01D29/21; B01D29/216; B01D29/50; B01D29/52; B01D29/88; B01D29/90; B01D29/902; B01D2201/00; B01D2201/04; B01D2201/043; B01D2201/0438
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
122 words
A FILTER TUBE FOR A FILTER UNIT COMPRISING: (A) A CORD WOUND FILTER TUBE HAVING A PERFORATED RIGID CORE EXTENDING THROUGHOUT THE ENTIRE LENGTH OF THE FILTER TUBE, (B) A TUBULAR EXTENSION CONSTRUCTED OF INSULATING MATERIAL AND OF SUBSTANTIALLY LARGER DIAMETER THAN THE CORE HAVING A PART POSITIONED IN THE WOUND BODY OF THE FILTER TUBE AND A PART EXTENDING OUTWARDLY BEYOND ONE END OF THE FILTER TUBE, THE PORTION OF THE TUBULAR EXTENSION EXTENDING WITHIN THE FILTER TUBE SURROUNDING THE SAID CORE AND SPACED RADIALLY OUTWARDLY FROM THE SIDEWALLS OF THE CORE BY A PLURALITY OF CORD WINDINGS AND A PLURALITY OF CORD WRAPPING EXTENDING OVER THE OUTER SURFACE OF THE SECTION OF THE TUBULAR EXTENSION POSITIONED WITHIN THE FILTER TUBE.
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) | 1970-05-15 | 1970-11-14 | 1971-05-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-05-15 | 1974-11-14 | 1975-05-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-05-15 | 1978-11-14 | 1979-05-16 | $7700.00 | Window Closed / Lapsed |