US2631110A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process of preparing a filter cloth
Assignee: Metakloth Co
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Filing: 1950-10-04
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Granted: 1953-03-10
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Expires: 1970-10-04
Abstract
No abstract record available.
Inventors
- 👤 Ottomar H Van Norden
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 00:10
CPC Classifications
D; D06; D06M; D06M11/00; D06M11/51; D06M11/55; D06M11/56; B; B01; B01D; B01D39/00; B01D39/08; D06M11/07; D06M11/11; D06M11/17; B01D2239/00; B01D2239/04; B01D2239/0464; B01D2239/10
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
150 words
THE PROCESS OF TREATING FILTER CLOTH TO PREPARE IT FOR USE IN THE FILTRATION OF ALKALINE AQUEOUS LIQUIDS, COMPRISING THE STEPS OF IMPREGNATING THE CLOTH IN A SINGLE AQUEOUS BATH, THE ESSENTIAL ACTIVE INGREDIENTS OF WHICH CONSIST OF: (A) AT LEAST ONE WATER-SOLUBLE SALT OF CERIUM SELECTED FROM THE GROUP CONSISTING OF CERIUM SELECTED FROM THE TATE AND CERIUM SULPHATE, SAID BATH HAVING A CERIUM CONCENTRATION OF ABOUT 0.45 POUND PER GALLON, (B) AT LEAST ONE BUFFER INGREDIENT EFFECTIVE TO CONTROL THE PH OF THE BATH TO A SELECTED VALUE IN THE RANGE OF 7 TO ABOUT 9 AND WHICH INGREDIENT IS OTHERWISE NEUTRAL, AND (C) A MINOR PROPORTION OF A WETTING AGEN; THEN MECHANICALLY REMOVING FROM THE CLOTH ANY LIQUID IN EXCCESS OF THAT AMOUNT REQUIRED TO SATURATE IT; AND THEREAFTER DRYING THE CLOTH TO COMPLETE THE PREPARATION THEREOF IN READINESS FOR DELIVERY TO A USER OF SAID CLOTH.
Claim 2
Dependent Claim
150 words
THE PROCESS OF TREATING FILTER CLOTH TO PREPARE IT FOR USE IN THE FILTRATION OF ALKALINE AQUEOUS LIQUIDS, COMPRISING THE STEPS OF IMPREGNATING THE CLOTH IN A SINGLE AQUEOUS BATH, THE ESSENTIAL ACTIVE INGREDIENTS OF WHICH CONSIST OF: (A) AT LEAST ONE WATER-SOLUBLE SALT OF CERIUM SELECTED FROM THE GROUP CONSISTING OF CERIUM SELECTED FROM THE TATE AND CERIUM SULPHATE, SAID BATH HAVING A CERIUM CONCENTRATION OF ABOUT 0.45 POUND PER GALLON, (B) AT LEAST ONE BUFFER INGREDIENT EFFECTIVE TO CONTROL THE PH OF THE BATH TO A SELECTED VALUE IN THE RANGE OF 7 TO ABOUT 9 AND WHICH INGREDIENT IS OTHERWISE NEUTRAL, AND (C) A MINOR PROPORTION OF A WETTING AGEN; THEN MECHANICALLY REMOVING FROM THE CLOTH ANY LIQUID IN EXCCESS OF THAT AMOUNT REQUIRED TO SATURATE IT; AND THEREAFTER DRYING THE CLOTH TO COMPLETE THE PREPARATION THEREOF IN READINESS FOR DELIVERY TO A USER OF SAID CLOTH.
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) | 1956-03-09 | 1956-09-08 | 1957-03-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-03-09 | 1960-09-08 | 1961-03-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-03-09 | 1964-09-08 | 1965-03-10 | $7700.00 | Window Closed / Lapsed |