US2600845A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Liquid filter
Assignee: Union Wadding Co
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Filing: 1947-03-13
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Granted: 1952-06-17
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Expires: 1967-03-13
Abstract
No abstract record available.
Inventors
- 👤 Robert E Carrigan
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 13:08
CPC Classifications
B; B01; B01D; B01D39/00; B01D39/14; B01D39/16; B01D39/18; A; A01; A01J; A01J11/00; A01J11/06
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
70 words
A FILTER SHEET COMPRISING A SERIES OF SUPERIMPOSED LAYERS OF CARDED FIBERS, INCLUDING A LAYER OF UNBONDED FIBERS AND ADDITIONAL UNWOVEN LAYERS AT OPPOSITE SIDES OF IT HAVING FIBERS WHICH ARE BONDED TOGETHER BY A FILM OF THERMO-SETTING WATER INSOLUBLE BINDER TRANSVERSELY PERMEABLE TO MILK, SAID BINDER BEING CURED METHYLATED MELAMINE FORMALDEHYDE RESIN AND STARCH VARYING IN RATIO FROM ONE PART OF RESIN TO ONE TO FOUR PARTS OF STARCH.
Claim 2
Dependent Claim
70 words
A FILTER SHEET COMPRISING A SERIES OF SUPERIMPOSED LAYERS OF CARDED FIBERS, INCLUDING A LAYER OF UNBONDED FIBERS AND ADDITIONAL UNWOVEN LAYERS AT OPPOSITE SIDES OF IT HAVING FIBERS WHICH ARE BONDED TOGETHER BY A FILM OF THERMO-SETTING WATER INSOLUBLE BINDER TRANSVERSELY PERMEABLE TO MILK, SAID BINDER BEING CURED METHYLATED MELAMINE FORMALDEHYDE RESIN AND STARCH VARYING IN RATIO FROM ONE PART OF RESIN TO ONE TO FOUR PARTS OF STARCH.
References Cited (Backward Citations)
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US2291080A
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Cited
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Cited
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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) | 1955-06-17 | 1955-12-17 | 1956-06-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-06-17 | 1959-12-17 | 1960-06-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-06-17 | 1963-12-17 | 1964-06-17 | $7700.00 | Window Closed / Lapsed |