Patent US3627686A successfully refreshed from Google Patents.
US3627686A
Expired / Lapsed
US
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Machine dishwashing compositions containing sodium polyacrylate and nta
Assignee: Chemed Corp
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Filing: 1968-09-30
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Granted: 1971-12-14
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Expires: 1988-09-30
Abstract
Abstract A machine dishwashing composition is disclosed which includes the combination of a chelating agent and a water-soluble polymer as detergent builders and specifically the combination of a water-soluble organic alkaline salt of nitrilotriacetic acid, and a water-soluble polyacrylate. Cooking and eating utensils may be cleaned by a low-foaming aqueous solution of the present machine dishwashing composition with less spotting and greater clarity. The present composition is particularly useful for sequestering hard water salts and for extending the normal water-softening capacity of machine dishwashing compositions.
Inventors
- 👤 Philip M Sabatelli
- 👤 Charles A Brungs
- 👤 Edwin R Loder
- 👤 Carmen R Sarge
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 17:26
CPC Classifications
C; C11; C11D; C11D3/00; C11D3/16; C11D3/37; C11D3/3746; C11D3/3757; C11D3/0005; C11D3/0026; C11D3/02; C11D3/04; C11D3/08; C11D3/10; C11D3/26; C11D3/33
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
18 words
The dishwashing composition of claim 1 combined with from about 20 to about 80 percent by weight water.
Claim 2
Dependent Claim
18 words
The dishwashing composition of claim 1 combined with from about 30 to about 60 percent by weight water.
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) | 1974-12-13 | 1975-06-14 | 1975-12-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-12-13 | 1979-06-14 | 1979-12-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-12-13 | 1983-06-14 | 1983-12-14 | $7700.00 | Window Closed / Lapsed |