Patent US3796667A successfully refreshed from Google Patents.
US3796667A
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Method for inhibiting iron containing scale formation in seawater distillaton plants
Assignee: WR Grace and Co Conn
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Filing: 1972-06-02
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Granted: 1974-03-12
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Expires: 1992-06-02
Abstract
Abstract A PROCESS FOR PREVENTION OF INCREASED FOULING DUE TO THE PRESENCE OF IRON IN SALINE WATER DISTALLATION PLANTS BY ADDING CERTAIN IRON SPECIFIC CHLEATING AGENTS TO THE SALINE WATER BEING FED TO THE DISTALLATION UNIT TO INHIBIT THE FORMATION OF IRON CONTAINING DEPOSITS. THESE DEPOSITS ARE EXTREMELY HEAT FLOW RESISTANT.
Inventors
- 👤 J Block
- 👤 B Watson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 21:44
CPC Classifications
C; C02; C02F; C02F1/00; C02F1/02; C02F1/04; C02F1/042; C02F5/00; C02F5/08; C02F5/10; C02F5/12
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) | 1977-03-11 | 1977-09-10 | 1978-03-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-03-11 | 1981-09-10 | 1982-03-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-03-11 | 1985-09-10 | 1986-03-12 | $7700.00 | Window Closed / Lapsed |