Patent US3692684A successfully refreshed from Google Patents.
US3692684A
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US
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Detergent
Assignee: VALTER SVEN ERWIN HENTSCHEL
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Filing: 1970-03-17
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Granted: 1972-09-19
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Expires: 1990-03-17
Abstract
Abstract A DETERGENT CONTAINING ALKALINE SALTS OF ORGANIC, ALIPHATIC AND/OR AROMATIC CARBOXYLIC ACIDS AND/OR ANHYDRIDES OF THE SAME WITH ONE OR SEVERAL CARBOXYLIC GROUPS. THESE SALTS REPLACE IN THE DETERGENT PREVIOUSLY USED PHOSPHATES WHICH CAUSED A EUTROPHICATION AND ENDANGERED THE ECOLOGY.
Inventors
- 👤 Gerhard Oskar Hentschel
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 10:58
CPC Classifications
C; C11; C11D; C11D3/00; C11D3/16; C11D3/20; C11D3/2075; C11D3/2003; C11D3/2065; C11D3/22; C11D3/221
Claims Analysis
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References Cited (Backward Citations)
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-09-19 | 1976-03-20 | 1976-09-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-09-19 | 1980-03-20 | 1980-09-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-09-19 | 1984-03-20 | 1984-09-19 | $7700.00 | Window Closed / Lapsed |