US3740339A
Expired / Lapsed
US
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Detergent formulation containing cured 6-carboxy cellulose as a sequestrant
Assignee: International Paper Co
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Filing: 1971-06-28
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Granted: 1973-06-19
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Expires: 1991-06-28
Abstract
Abstract THE ELIMINATION OF PHOSPHORUS-CONTAINING COMPOUNDS FROM DETERGENT FORMULATIONS, WICH CAUSE WATER POLLUTION, AND THEIR REPLACEMENT WITH NON-PHOSPHORUS-CONTAINING COMPOUNDS OF EQUAL EFFICACY IS ACHIEVED BY EMPLOYING THE CURED PRODUCT OF THE REACTION BETWEEN 6-CARBOXY CELLULOSE AND AN AQUEOUS SOLUTION OF A LEVIS ACID CATALYST.
Inventors
- 👤 Donald D Mac
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 12:10
CPC Classifications
C; C11; C11D; C11D3/00; C11D3/16; C11D3/20; C11D3/22; C11D3/222; C11D3/225
Claims Analysis
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-06-18 | 1976-12-18 | 1977-06-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-06-18 | 1980-12-18 | 1981-06-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-06-18 | 1984-12-18 | 1985-06-19 | $7700.00 | Window Closed / Lapsed |