Patent US3336174A successfully refreshed from Google Patents.
US3336174A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of making a fibrous filter product
Assignee: Eastman Kodak Co
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Filing: 1965-04-06
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Granted: 1967-08-15
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Expires: 1985-04-06
Abstract
No abstract record available.
Inventors
- 👤 Richard F Dyer
- 👤 Jr John M Wininger
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 10:35
CPC Classifications
A; A24; A24D; A24D3/00; A24D3/02; A24D3/0204; A24D3/0212; Y; Y10; Y10S; Y10S264/00; Y10S264/08; Y10S264/47
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
144 words
A PROCESS FOR THE PRODUCTION OF A FIBROUS FILTER PRODUCT COMPRISING THE STEPS OF: (A) ORIENTING BY DRAFTING A POLYMERIC FILM TO INCREASE ITS FRCTURABILTIY FACTOR TO GREATER THAN ABOUT 300; (B) FRACTURING SAID DRAFTED, POLYMERIC FILM TO LONGITUDINALLY SLIT SAID FILM INOT A PLURALITY OF DISCONTINUOUS RIBBONS DEFINED BY SAID SLITS, EACH HAVING A DENIER OF ABOUT 5 TO ABOUT 20 AND EACH OF SAID RIBBONS HAVING LESS THAN ABOUT 10%% BY WEIGHT OF RIBBON OF HAIR-LIKE, SHORT EXTENSIONS OF LESS THAN ABOUT 5 MICONS IN SIZE EXTENDING OUTWARDLY THEREFROM, SAID FRACTURING AND HAIRLIKE EXTENSIONS BEING PRODUCED BY SUBJECTING SAID FILM TO A JET OF HIGH PRESSURE FLUID IMPINGING ON THE SURFACES THEREOF; (C) COMPACTING A PLURALITY OF SAID RIBBONS INTO A FIBROUS, POROUS MASS THE PORES OF WHICH ARE CAUSED TO BE TORTUOUS PASSAGEWAYS BY SAID HAIR-LIKE EXTENSIONS AND THE RIBBONS THEMSELVES.
Claim 2
Dependent Claim
144 words
A PROCESS FOR THE PRODUCTION OF A FIBROUS FILTER PRODUCT COMPRISING THE STEPS OF: (A) ORIENTING BY DRAFTING A POLYMERIC FILM TO INCREASE ITS FRCTURABILTIY FACTOR TO GREATER THAN ABOUT 300; (B) FRACTURING SAID DRAFTED, POLYMERIC FILM TO LONGITUDINALLY SLIT SAID FILM INOT A PLURALITY OF DISCONTINUOUS RIBBONS DEFINED BY SAID SLITS, EACH HAVING A DENIER OF ABOUT 5 TO ABOUT 20 AND EACH OF SAID RIBBONS HAVING LESS THAN ABOUT 10%% BY WEIGHT OF RIBBON OF HAIR-LIKE, SHORT EXTENSIONS OF LESS THAN ABOUT 5 MICONS IN SIZE EXTENDING OUTWARDLY THEREFROM, SAID FRACTURING AND HAIRLIKE EXTENSIONS BEING PRODUCED BY SUBJECTING SAID FILM TO A JET OF HIGH PRESSURE FLUID IMPINGING ON THE SURFACES THEREOF; (C) COMPACTING A PLURALITY OF SAID RIBBONS INTO A FIBROUS, POROUS MASS THE PORES OF WHICH ARE CAUSED TO BE TORTUOUS PASSAGEWAYS BY SAID HAIR-LIKE EXTENSIONS AND THE RIBBONS THEMSELVES.
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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) | 1970-08-14 | 1971-02-13 | 1971-08-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-08-14 | 1975-02-13 | 1975-08-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-08-14 | 1979-02-13 | 1979-08-15 | $7700.00 | Window Closed / Lapsed |