Patent US3784469A successfully refreshed from Google Patents.
US3784469A
Expired / Lapsed
US
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Process of preventing scale and deposit formation in aqueous systems
Assignee: Joh A Benckiser GmbH
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Filing: 1972-06-16
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Granted: 1974-01-08
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Expires: 1992-06-16
Abstract
Abstract SCALE AND DEPOSIT FORMATION IN AQUEOUS SYSTEMS IS PREVENTED OR SUPPRESSED BY THE ADDITION THERETO OF CYCLOHEXANE-1,2,3,4,5-PENATACRBOXYLIC ACID PREFERABLY IN SUBSTOIEHIOMETRIC AMOUNTS CALCULATED FOR THE SCALE AND HARDNESS CAUSING COMPOUND PRESENT IN SUCH AQUEOUS SYSTEMS. A SYNERGISTRIC AMOUNTS OF AMINO ALKYLENE PHOSHONIC STOICHIOMETRIC AMOUNTS OF AMINO ALKYLENE PHOSHOPNIC ACIDS OR ALKANE PHOSPHONIC ACIDS.
Inventors
- 👤 F Krueger
- 👤 L Bauer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 19:38
CPC Classifications
C; C11; C11D; C11D3/00; C11D3/16; C11D3/20; C11D3/2075; C11D3/2082; C02; C02F; C02F5/00; C02F5/08; C02F5/10
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) | 1977-01-07 | 1977-07-09 | 1978-01-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-01-07 | 1981-07-09 | 1982-01-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-01-07 | 1985-07-09 | 1986-01-08 | $7700.00 | Window Closed / Lapsed |