US3769223A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Detergent formulations
Assignee: Ethyl Corp
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Filing: 1972-07-28
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Granted: 1973-10-30
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Expires: 1992-07-28
Abstract
Abstract TO OBVIATE EUTROPHICATION OF WATER, NON-PHOSPHORUS DETERGENT BUILDERS AND SEQUESTERING AGENTS ARE PROVIDED. THESE ARE EITHER (A) A 1-OXACYCLOPROPANE-2,3-DICARBOXYLIC ACID, (B) A WATER SOLUBLE SALT OF A 1-OXACYCLOPROPANE-2,3DICARBOXYLIC ACID OR A MIXTURE OF (A) AND (B). CONVENTIONAL DETERGENT ACTIVES MAY BE USED WITH THESE BUILDERS.
Inventors
- 👤 T Pearson
- 👤 G Nelson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 18:29
CPC Classifications
C; C11; C11D; C11D3/00; C11D3/16; C11D3/20; C11D3/2096
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) | 1976-10-29 | 1977-04-30 | 1977-10-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-10-29 | 1981-04-30 | 1981-10-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-10-29 | 1985-04-30 | 1985-10-30 | $7700.00 | Window Closed / Lapsed |