Patent EP0461572A2 successfully refreshed from Google Patents.
US3307706A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Milk filters
Assignee: Kendall Co
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Filing: 1963-12-13
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Granted: 1967-03-07
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Expires: 1983-12-13
Abstract
No abstract record available.
Inventors
- 👤 Philip S Taylor
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 21:59
CPC Classifications
A; A01; A01J; A01J11/00; A01J11/06; B; B01; B01D; B01D39/00; B01D39/14; B01D39/16; B01D39/1607; B01D39/1623
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
117 words
AN IMPREGNATED AND BONDED NON-WOVEN FILTER SHEET MATERIAL OF INTIMATELY INTERMINGLED TEXTILE-LENGTH FIBERS CONSISTING ESSENTIALLY OF BETWEEN 65% AND 95% OF, VISCOSE RAYON FIBERS OF DENIER NOT GREATER THAN ABOUT 1.5, AND HAVING A VOLUMETRIC SWELLING INDEX IN WATER OF GREATER THAN 10%, AND BETWEEN 35% TO 5% OF CRIMPED SYNTHETIC FIBERS, SAID FIBERS HAVING A WET STIFFNESS OF AT LEAST 8 GRAMS PER DENIER AT ELONGATIONS OF BETWEEN 1% AND 10%, A VOLUMETRIC SWELLING INDEX IN WATER OF LESS THAN 3%, AND IN WHICH THE PRODUCT OF WET STIFFNESS TIMES FIBER DENIER IS NOT LESS THAN ABOUT 40, SAID FILTER SHEET BEING OF SUBSTANTIALLY UNIFORM COMPOSITION THROUGHOUT ITS DEPTH AND BEING BONDED SUBSTANTIALLY THROUGHOUT ITS DEPTH.
Claim 2
Dependent Claim
117 words
AN IMPREGNATED AND BONDED NON-WOVEN FILTER SHEET MATERIAL OF INTIMATELY INTERMINGLED TEXTILE-LENGTH FIBERS CONSISTING ESSENTIALLY OF BETWEEN 65% AND 95% OF, VISCOSE RAYON FIBERS OF DENIER NOT GREATER THAN ABOUT 1.5, AND HAVING A VOLUMETRIC SWELLING INDEX IN WATER OF GREATER THAN 10%, AND BETWEEN 35% TO 5% OF CRIMPED SYNTHETIC FIBERS, SAID FIBERS HAVING A WET STIFFNESS OF AT LEAST 8 GRAMS PER DENIER AT ELONGATIONS OF BETWEEN 1% AND 10%, A VOLUMETRIC SWELLING INDEX IN WATER OF LESS THAN 3%, AND IN WHICH THE PRODUCT OF WET STIFFNESS TIMES FIBER DENIER IS NOT LESS THAN ABOUT 40, SAID FILTER SHEET BEING OF SUBSTANTIALLY UNIFORM COMPOSITION THROUGHOUT ITS DEPTH AND BEING BONDED SUBSTANTIALLY THROUGHOUT ITS DEPTH.
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) | 1970-03-06 | 1970-09-05 | 1971-03-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-03-06 | 1974-09-05 | 1975-03-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-03-06 | 1978-09-05 | 1979-03-07 | $7700.00 | Window Closed / Lapsed |