US3276597A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Filter media
Assignee: Johnson and Johnson
•
Filing: 1963-11-06
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Granted: 1966-10-04
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Expires: 1983-11-06
Abstract
No abstract record available.
Inventors
- 👤 Frederick K Mesek
- 👤 Erle V Painter
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 07:49
CPC Classifications
B; B01; B01D; B01D39/00; B01D39/14
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
156 words
A FIBER FILTER MEDIA FOR USE IN A FILTRATION OF SOLUTIONS OF HIGH POLYMERIC MATERIALS PREPARATORY TO THE CONVERSION OF SAID SOLUTIONS INTO FILAMENTS, FILM AND THE LIKE COMPRISING AN INCOMING FILTER ZONE OF RELATIVELY LARGE PORE SIZE, THE FIBERS FORMING SAID FILTER ZONE OF RELATIVELY LARGE PORE SIZE CONSISTING ESSENTIALLY OF RELATIVELY STIFF, RESILIENT, SYNTHETIC FIBERS OF DENIER WITHIN THE RANGE OF ABOUT 5 TO 24 WHICH SYNTHETIC FIBERS RETAIN THEIR RIGIDITY DURING FILTRATION AND ARE INERT TO THE FILTRATION SOLUTION, SAID INCOMING FILTER ZONE BEING FOLLOWED BY A FILTER ZONE OF SUBSTANTIALLY SMALLER PORE SIZE FORMED OF HIGHLY FLEXIBLE READILY COMPRESSIBLE FIBERS HAVING A DENIER SUBSTANTIALLY SMALLER THAN THE DENIER OF THE FIBERS OF SAID INCOMING FILTER ZONE, THE PORE SIZE OF SAID INCOMING FILTER ZONE BEING WITHIN THE RANGE OF 500 THROUGH 1000 MICRONS WHERE THE WEIGHT OF FIBERS FORMING SAID INCOMING FILTER ZONE IS NOT SUBSTANTIALLY OVER ONE OUNCE PER SQUARE YARD.
Claim 2
Dependent Claim
156 words
A FIBER FILTER MEDIA FOR USE IN A FILTRATION OF SOLUTIONS OF HIGH POLYMERIC MATERIALS PREPARATORY TO THE CONVERSION OF SAID SOLUTIONS INTO FILAMENTS, FILM AND THE LIKE COMPRISING AN INCOMING FILTER ZONE OF RELATIVELY LARGE PORE SIZE, THE FIBERS FORMING SAID FILTER ZONE OF RELATIVELY LARGE PORE SIZE CONSISTING ESSENTIALLY OF RELATIVELY STIFF, RESILIENT, SYNTHETIC FIBERS OF DENIER WITHIN THE RANGE OF ABOUT 5 TO 24 WHICH SYNTHETIC FIBERS RETAIN THEIR RIGIDITY DURING FILTRATION AND ARE INERT TO THE FILTRATION SOLUTION, SAID INCOMING FILTER ZONE BEING FOLLOWED BY A FILTER ZONE OF SUBSTANTIALLY SMALLER PORE SIZE FORMED OF HIGHLY FLEXIBLE READILY COMPRESSIBLE FIBERS HAVING A DENIER SUBSTANTIALLY SMALLER THAN THE DENIER OF THE FIBERS OF SAID INCOMING FILTER ZONE, THE PORE SIZE OF SAID INCOMING FILTER ZONE BEING WITHIN THE RANGE OF 500 THROUGH 1000 MICRONS WHERE THE WEIGHT OF FIBERS FORMING SAID INCOMING FILTER ZONE IS NOT SUBSTANTIALLY OVER ONE OUNCE PER SQUARE YARD.
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) | 1969-10-03 | 1970-04-04 | 1970-10-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-10-03 | 1974-04-04 | 1974-10-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-10-03 | 1978-04-04 | 1978-10-04 | $7700.00 | Window Closed / Lapsed |