Patent US3692704A successfully refreshed from Google Patents.
US3692704A
Expired / Lapsed
US
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Method of laundering fabrics
Assignee: Chemed Corp
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Filing: 1970-10-19
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Granted: 1972-09-19
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Expires: 1990-10-19
Abstract
Abstract METHOD FOR IMPROVING THE BRIGHTNESS OF FABRICS WHICH COMPRISES FORMING A SOLUTION OF A BUILT DETERGENT COMPOSITION IN WATER HAVING A HARDNESS OF FROM 0 TO 5 GRAINS PER GALLON, SAID DETERGENT COMPOSITION CONTAINING, AS THE BUILDER COMPONET, 50% OF A MIXTURE CONSISTING OF 30% BY WEIGHT SODIUM POLYACRYLATE HAVING A WEIGHT AVERAGE MOLECULAR WEIGHT OF 100,000 AND 20% BE WEIGHT OF POLY (N,N-DICARBOXYMETHYL ACRYLAMIDE) HAVING A WEIGHT OF AVERAGE MOLECULAR WEIGHT OF 50,000 AND LAUNDERING SAID ARTICLES IN SAID LAUNDERING SOLUTION.
Inventors
- 👤 James K Stamm
- 👤 Edwin R Loder
- 👤 Charles A Brungs
- 👤 Herman Kerst
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 08:54
CPC Classifications
C; C11; C11D; C11D3/00; C11D3/16; C11D3/37; C11D3/3746; C11D3/3769; C11D3/3757
Claims Analysis
Total Claims: 0
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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) | 1975-09-19 | 1976-03-20 | 1976-09-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-09-19 | 1980-03-20 | 1980-09-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-09-19 | 1984-03-20 | 1984-09-19 | $7700.00 | Window Closed / Lapsed |