US3764559A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Detergent compositions
Assignee: Ecolab Inc
•
Filing: 1971-02-05
•
Granted: 1973-10-09
•
Expires: 1991-02-05
Abstract
Abstract Detergent compositions containing maleic anhydride polymers.
Inventors
- 👤 W Mizuno
- 👤 T Brunelle
- 👤 L Rue
- 👤 S Crecelius
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 17:07
CPC Classifications
C; C11; C11D; C11D3/00; C11D3/16; C11D3/37; C11D3/3746; C11D3/3757
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
160 words
A machine dishwashing composition consisting essentially of from about 10 to 95 percent by weight of a non-phosphate alkaline detergent salt, from 0 to 40 percent by weight of an alkaline detergent phosphate salt, from 0 to 8 percent by weight of a nonionic surfactant which in The Ross-Miles foam test provides an initial foam of not more than about 45 milliliters in height and not more than about 15 milliliter foam height after 5 minutes, from 0 to 10 percent by weight of a chlorine-releasing agent, from 0 to 40 percent by weight of a neutral inorganic salt, and an amount sufficient for chelation of magnesium and calcium ions ranging from 5 to 65 percent by weight of an alkali metal salt of a copolymer of maleic anhydride with vinylacetate in a 1:1 ratio, said copolymer having a relative viscosity of from about 1 to 10 when determined at 25* C. on a four weight percent aqueous solution thereof.
Claim 2
Dependent Claim
162 words
A machine dishwashing composition consisting essentially of from about 25 to 60 percent by weight of a non-phosphate alkaline detergent salt, from 10 to 30 percent by weight of an alkaline detergent phosphate salt, from 0.5 to 2.0 percent by weight of a nonionic surfactant which in the Ross-Miles foam test provides an initial foam of not more than about 45 milliliters in height and not more than about 15 milliliter foam height after 5 minutes, from 0.5 to 4.0 percent by weight of a chlorine-releasing agent, from 0 to 20 percent by weight of a neutral inorganic salt, and an amount sufficient for chelation of magnesium and calcium ions ranging from 20 to 50 percent by weight of a copolymer in the acid or salt form of maleic anhydride and vinylacetate in a 1:1 molar ratio, said copolymer having a relative viscosity of from about 1 to 10 when determined at 25* C. on a four weight percent aqueous solution thereof.
References Cited (Backward Citations)
US3235505A
Cited
US3579455A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-10-08 | 1977-04-09 | 1977-10-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-10-08 | 1981-04-09 | 1981-10-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-10-08 | 1985-04-09 | 1985-10-09 | $7700.00 | Window Closed / Lapsed |