US2544649A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Caustic alkali composition of matter and its use as a polyvalent metal precipitationinhibitor
Assignee: Individual
•
Filing: 1949-01-14
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Granted: 1951-03-13
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Expires: 1969-01-14
Abstract
No abstract record available.
Inventors
- 👤 Frederick C Bersworth
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 10:09
CPC Classifications
C; C01; C01D; C01D1/00; C01D1/04
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
73 words
IN THE METHOD OF INHIBITING THE PRECIPITATION OF FE AND OTHER POLY-VALENT METALS IN ALKALINE PH AQUEOUS SOLUTIONS WHICH COMPRISES INCORPORATING THEREIN AN AMOUNT OF TRIETHANOLAMINE ALCOHOLATE SALT WHICH IS AT LEAST APPROXIMATELY SUFFICIENT TO REACT SUBSTANTIALLY COMPLETELY WITH THE SAID IRON TO FORM A SOLUBLE IRON SALT THEREWITH, SAID AMOUNT BEING IN THE APPROXIMATE RATIO OF ONE MOLAR WEIGHT OF THE TRIETHANOLAMINE TO EACH TWO (2) IRON MOLECULES PRESENT IN THE SOLUTION.
Claim 2
Dependent Claim
73 words
IN THE METHOD OF INHIBITING THE PRECIPITATION OF FE AND OTHER POLY-VALENT METALS IN ALKALINE PH AQUEOUS SOLUTIONS WHICH COMPRISES INCORPORATING THEREIN AN AMOUNT OF TRIETHANOLAMINE ALCOHOLATE SALT WHICH IS AT LEAST APPROXIMATELY SUFFICIENT TO REACT SUBSTANTIALLY COMPLETELY WITH THE SAID IRON TO FORM A SOLUBLE IRON SALT THEREWITH, SAID AMOUNT BEING IN THE APPROXIMATE RATIO OF ONE MOLAR WEIGHT OF THE TRIETHANOLAMINE TO EACH TWO (2) IRON MOLECULES PRESENT IN THE SOLUTION.
References Cited (Backward Citations)
US2196596A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1954-03-12 | 1954-09-11 | 1955-03-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-03-12 | 1958-09-11 | 1959-03-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-03-12 | 1962-09-11 | 1963-03-13 | $7700.00 | Window Closed / Lapsed |