US3829383A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Detergent builder and sequestering agent
Assignee: Ethyl Corp
•
Filing: 1972-12-11
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Granted: 1974-08-13
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Expires: 1992-12-11
Abstract
Abstract TO OBVIATE EUTROPHICATION OF LAKES, STREAMS, ETC., NONPHOSPHOROUS HIGHLY BIODDEGRADABLE BUILDERS AND SEQUESTRANTS ARE PROOVIDED FOR HOUSEHOLD AND INDUSTRIAL USE. THESE BUILDERS AND SEQUESTRANTS ARE EITHER (1) A CIS-2,5-DISUNSTITUTED TETRAHYDROFURAN IN THE WHICH THE SUBSTITUTENTS ARE CARBOXY OR CARBOXYMETHYL GROUPS, (2) WATER SOLUBLES SALTS OF SUCH TETRAHYDROFURANS, OR (3) MIXTURES OF (1) AND (2). CONVENTIONAL DETERGENT ACTIVES MAY ALSO BE UTILIZED IN COMBINATION WITH THE BUILDERS OR SEQUESTRANTS OF THIS INVENTION.
Inventors
- 👤 G Robinson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 00:31
CPC Classifications
C; C11; C11D; C11D3/00; C11D3/16; C11D3/20; C11D3/2096; C11D3/2075
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) | 1977-08-12 | 1978-02-11 | 1978-08-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-08-12 | 1982-02-11 | 1982-08-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-08-12 | 1986-02-11 | 1986-08-13 | $7700.00 | Window Closed / Lapsed |