Patent US3248465A successfully refreshed from Google Patents.
US3248465A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of filter media manufacture
Assignee: Johnson and Johnson
•
Filing: 1962-12-26
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Granted: 1966-04-26
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Expires: 1982-12-26
Abstract
No abstract record available.
Inventors
- 👤 Erle V Painter
- 👤 William R Strickel
- 👤 George L Weir
- 👤 Fred K Mesek
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 15:22
CPC Classifications
B; B01; B01D; B01D39/00; B01D39/14; B01D39/16; B01D39/1607; B01D39/18; B01D2239/00; B01D2239/04; B01D2239/0464; B01D2239/06; B01D2239/0604; B01D2239/064; B01D2239/065; B01D2239/0654; B01D2239/0681; B01D2239/08; B01D2239/086; B01D2239/10; B01D2239/12; B01D2239/1225; B01D2239/1233; B01D2239/1291; Y; Y10; Y10S; Y10S521/00; Y10S521/905
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
167 words
A METHOD OF MAKING FILTER MEDIA HAVING OMNIDIRECTIONAL STRENGTH AND GRADED PORSOITY WHICH METHOD COMPRISES ASSEMBLING A RELATIVELY UNIFORM, HOMOGENEOUS WEB OF FIBERS INCLUDING FIBERS OF A PLURALITY OF WEIGHTS AND SIZE, REMOVING FIBERS FROM THE EDGE OF SAID WEB AND FORCEABLY THROWING SAID FIBERS ACROSS THE PATH OF A RAPIDLY MOVING AIR STREAM HAVING A SUBSTANTIALLY UNIFORM INITIAL FLOW, THE FIBERS BEING SIDTRIBUTED ACROSS SAID AIR STREAM ACCORDING TO THEIR WEIGHT AND SIZE THROUGH THE INITIAL THROWING FORCE WITH THE LIGHTER FIBERS TRAVELING THE SHORTEST DISTANCE ACROSS THE SAID AIR STREAM AND THE HEAVIER FIBERS TRAVELING THE GREATEST DISTANCE ACROSS SAID AIR STREAM AND SAID FIBERS BEING CARRIED GENERALLY HORIZONTALLY BY SAID AIR STREAM WHILE BEING SEPARATED BY SAID INITIAL THROWING FORCE, AND MOVING A BARRIER ADJACENT SAID AIR STREAM AND IN THE PATHS OF SAID FIBERS WHEREBY SAID FIBERS ARE DEPOSITED THEREON, SAID FIBERS BEING DEPOSITED SEQUENTIALLY IN ACCORDANCE WITH THE WEIGHT AND SIZE THEREOF WHEREBY THE WEB ON SAID BARRIER HAS A GRADED POROSITY.
Claim 2
Independent Claim
167 words
A METHOD OF MAKING FILTER MEDIA HAVING OMNIDIRECTIONAL STRENGTH AND GRADED PORSOITY WHICH METHOD COMPRISES ASSEMBLING A RELATIVELY UNIFORM, HOMOGENEOUS WEB OF FIBERS INCLUDING FIBERS OF A PLURALITY OF WEIGHTS AND SIZE, REMOVING FIBERS FROM THE EDGE OF SAID WEB AND FORCEABLY THROWING SAID FIBERS ACROSS THE PATH OF A RAPIDLY MOVING AIR STREAM HAVING A SUBSTANTIALLY UNIFORM INITIAL FLOW, THE FIBERS BEING SIDTRIBUTED ACROSS SAID AIR STREAM ACCORDING TO THEIR WEIGHT AND SIZE THROUGH THE INITIAL THROWING FORCE WITH THE LIGHTER FIBERS TRAVELING THE SHORTEST DISTANCE ACROSS THE SAID AIR STREAM AND THE HEAVIER FIBERS TRAVELING THE GREATEST DISTANCE ACROSS SAID AIR STREAM AND SAID FIBERS BEING CARRIED GENERALLY HORIZONTALLY BY SAID AIR STREAM WHILE BEING SEPARATED BY SAID INITIAL THROWING FORCE, AND MOVING A BARRIER ADJACENT SAID AIR STREAM AND IN THE PATHS OF SAID FIBERS WHEREBY SAID FIBERS ARE DEPOSITED THEREON, SAID FIBERS BEING DEPOSITED SEQUENTIALLY IN ACCORDANCE WITH THE WEIGHT AND SIZE THEREOF WHEREBY THE WEB ON SAID BARRIER HAS A GRADED POROSITY.
References Cited (Backward Citations)
US2624079A
Cited
US2746895A
Cited
US2769741A
Cited
US3010161A
Cited
US3073735A
Cited
GB805724A
Cited
US3028287A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-04-25 | 1969-10-25 | 1970-04-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-04-25 | 1973-10-25 | 1974-04-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-04-25 | 1977-10-25 | 1978-04-26 | $7700.00 | Window Closed / Lapsed |