US3629121A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Carboxylated starches as detergent builders
Assignee: Individual
•
Filing: 1969-12-15
•
Granted: 1971-12-21
•
Expires: 1989-12-15
Abstract
Abstract CERTAIN CARBOXY-CONTAINING DERIVATIVES OF STARCHES IN SALT FORM WITH AN AVERAGE OF MORE THAN CARBOXY GROUP PER REPEATING MONOMER UNIT, PARTICULARLY THOSE WITH MORE THAN ONE CARBOXYL GROUP PER REPEATING GLUCOSE UNIT ARE EXTREMELY EFFECTIVE DETERGENT BUILDERS IN BOTH SOLID AND LIQUID LAUNDRY DETERGENTS. DETERGENTS FORMULATED WITH THESE BUILDERS EXHIBIT EXCELLENT CHELATING ABILITY FOR HEAVY METAL IONS, AND EXCELLENT GENERAL DETERGENCY. THESE STARCH DERIVATIVE BUILDERS, UNLIKE THE COMMONLY USED PHOSPHATES AND NITRATES, DO NOT ACCELERATE EUTROPHICATION, SINCE THEY ARE NOT NOT ALGAE GROWTH STIMULANTS. ALKALI METAL SALTS OF CARBOXYMETHYL CELLULOSE ARE ALSO USEFUL IS BUILDERS.
Inventors
- 👤 Ibrahim A Eldib
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 19:02
CPC Classifications
C; C11; C11D; C11D3/00; C11D3/16; C11D3/20; C11D3/22; C11D3/222; C11D3/225; C08; C08B; C08B31/00; C11D3/223
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
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) | 1974-12-20 | 1975-06-21 | 1975-12-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-12-20 | 1979-06-21 | 1979-12-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-12-20 | 1983-06-21 | 1983-12-21 | $7700.00 | Window Closed / Lapsed |