US3043772A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of treating water systems and products useful therein
Assignee: Hagan Chemicals and Controls Inc
•
Filing: 1956-08-27
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Granted: 1962-07-10
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Expires: 1976-08-27
Abstract
No abstract record available.
Inventors
- 👤 Robert W Liddell
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 14:25
CPC Classifications
C; C02; C02F; C02F5/00; C02F5/08; C02F5/086
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
101 words
A METHOD OF MAINTAINING THE DESIRED CONCENTRATION OF PHOSPHATE IONS IN A WATER SYSTEM FOR LONG PERIODS OF TIME AND AT A SUBSTANTIALLY UNIFORM LEVEL, WHICH COMPRISES FLOWING THE WATER IN CONTACT WITH A MOLECULARLY DEHYDRATED PHOSPHATE CONSISTING ESSENTIALLY OF THE OXIDES MO, AMO, AND P2O5 WHERE M IS AN ALKALI METAL AND AM IS AN ALKALINE EARTH METAL, SAID PHOSPHATE BEING IN THE FORM OF FLAT PLATELETS HAVING A THICKNESS NO GREATER THAN ONE-FOURTH INCH, ALL OF WHICH PASS THROUGH A SCREEN HAVING TWO-INCH SQUARE OPENINGS AND ALL OF WHICH ARE RETAINED ON A SCREEN HAVING ONE-HALF INCH SQUARE OPENINGS.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1965-07-09 | 1966-01-08 | 1966-07-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-07-09 | 1970-01-08 | 1970-07-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-07-09 | 1974-01-08 | 1974-07-10 | $7700.00 | Window Closed / Lapsed |