US2862880A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of clarifying water by hydrophobic polyamines
Assignee: Armour and Co
•
Filing: 1954-07-27
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Granted: 1958-12-02
•
Expires: 1974-07-27
Abstract
No abstract record available.
Inventors
- 👤 Harry J Clemens
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 14:44
CPC Classifications
C; C02; C02F; C02F1/00; C02F1/52; C02F1/5236; C02F1/54
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
38 words
THE METHOD OF CLARIFYING WATER CONTAINING A COLLOIDAL SUSPENSION OF NEGATIVELY-CHARGED MINERAL PARTICLES COMPRISING INTRODUCING INTO SAID WATER A POLYAMINE COMPOUND SELECTED FROM THE GROUP CONSISTING OF THE COMPOUNDS AND WATER-SOLUBLE SALTS THEREOF REPRESENTED BY THE TYPE FORMULA:
Claim 2
Independent Claim
38 words
THE METHOD OF CLARIFYING WATER CONTAINING A COLLOIDAL SUSPENSION OF NEGATIVELY-CHARGED MINERAL PARTICLES COMPRISING INTRODUCING INTO SAID WATER A POLYAMINE COMPOUND SELECTED FROM THE GROUP CONSISTING OF THE COMPOUNDS AND WATER-SOLUBLE SALTS THEREOF REPRESENTED BY THE TYPE FORMULA:
Claim 3
Dependent Claim
16 words
THE METHOD OF CLAIM 1 IN WHICH IS ALSO INTRODUCED IN SAID WATER AN INORGANIC COAGULANT.
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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) | 1961-12-01 | 1962-06-02 | 1962-12-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-12-01 | 1966-06-02 | 1966-12-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-12-01 | 1970-06-02 | 1970-12-02 | $7700.00 | Window Closed / Lapsed |