US4242216A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Stabilized dichlorodimethyl hydantoin
Assignee: Lever Industrial Co
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Filing: 1979-09-27
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Granted: 1980-12-30
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Expires: 1999-09-27
Abstract
Abstract Dichlorodimethyl hydantoin stabilized for use in alkaline detergent formulations by forming granules or briquettes of a minimum size and hardness.
Inventors
- 👤 Denny E. Daugherty
- 👤 Edwin R. Loder
- 👤 Gary L. Young
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 19:09
CPC Classifications
C; C11; C11D; C11D17/00; C11D17/06; C11D3/00; C11D3/395; C11D3/3955
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
102 words
A dry alkaline powdered dishmachine detergent consisting essentially of: 0-50% Sodium carbonate 0-50% Sodium tripolyphosphate 0-90% Sodium chloride or sodium sulfate 0-15% Sodium metasilicate, anhydrous 0-30% Sodium hydroxide 0-5% Wetting agent 0.1-90% 1,3-dichloro-5,5-dimethylhydantoin with the proviso that the composition contains at least 10% of one or more alkaline compounds selected from the group consisting of sodium carbonate, tripolyphosphate, metasilicate, or hydroxide; the said hydantoin derivative consisting of praticles in the -10+100 mesh range, U.S. screen, compacted at a pressure in the range of about 1000 to 200,000 psi, whereby chlorine loss on storage for 90 days is not more than about 2%.
Claim 2
Dependent Claim
102 words
A dry alkaline powdered dishmachine detergent consisting essentially of: 0-50% Sodium carbonate 0-50% Sodium tripolyphosphate 0-90% Sodium chloride or sodium sulfate 0-15% Sodium metasilicate, anhydrous 0-30% Sodium hydroxide 0-5% Wetting agent 0.1-90% 1,3-dichloro-5,5-dimethylhydantoin with the proviso that the composition contains at least 10% of one or more alkaline compounds selected from the group consisting of sodium carbonate, tripolyphosphate, metasilicate, or hydroxide; the said hydantoin derivative consisting of praticles in the -10+100 mesh range, U.S. screen, compacted at a pressure in the range of about 1000 to 200,000 psi, whereby chlorine loss on storage for 90 days is not more than about 2%.
Claim 3
Dependent Claim
16 words
Detergent according to claim 1 in which the compaction pressure is about 30,000 to 40,000 psi.
Claim 4
Dependent Claim
25 words
Composition according to claim 1 consisting essentially of: 30% Sodium carbonate 33% Sodium tripolyphosphate 10% Sodium chloride 15% Sodium metasilicate 10% Sodium hydroxide 2.0% 1,3-dichloro-5,5-dimethylhydantoin
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) | 1983-12-30 | 1984-06-30 | 1984-12-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1987-12-30 | 1988-06-30 | 1988-12-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1991-12-30 | 1992-06-30 | 1992-12-30 | $7700.00 | Window Closed / Lapsed |