US2687374A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Filtration method
Assignee: Monsanto Chemicals Ltd
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Filing: 1951-04-27
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Granted: 1954-08-24
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Expires: 1971-04-27
Abstract
No abstract record available.
Inventors
- 👤 David T Mowry
- 👤 Ross M Hedrick
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 01:58
CPC Classifications
B; B01; B01D; B01D15/00; B01D39/00; B01D39/02; B01D39/06; C; C02; C02F; C02F1/00; C02F1/52; C02F1/54; C02F3/00; C02F3/02; C02F3/10; Y; Y02; Y02W; Y02W10/00; Y02W10/10
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
97 words
THE METHOD OF DECONTAMINATING AQUEOUS WASTE LIQUIDS WHICH COMPRISES PERCOLATING THEM THROUGH A BODY OF AGGREGATED SOIL IN WHICH THERE HAS BEEN DISPERSED A SYNTHETIC WATER-SOLUBLE POLYMER HAVING A STRUCTURE DERIVED BY THE POLYMERIZATION OF A MONO-OLEFINIC COMPOUND THROUGH ITS ALIPHATIC UNSATURATED GROUPS, AND CONTAINING HYDROPHILIC SUBSTITUENTS SELECTED FROM THE GROUP CONSISTING OF CARBOXYL, ALKALI METAL CARBOXY SALT, ALKALINE EARTH METAL CARBOXY SALT, AMMONIUM CARBOXY SALT, CARBOXY AMIDE, SULFONIC ACID SALT, TERTIARY AMINO AND HYDROXYL RADICALS, SAID POLYMERS HAVING A MOLECULAR WEIGHT OF AT LEAST 10,000 HAVING SUFFICIENT HYDROPHILIC SUBSTITUENTS TO RENDER THE SOIL AGGREGATES WATER STABLE.
Claim 2
Independent Claim
97 words
THE METHOD OF DECONTAMINATING AQUEOUS WASTE LIQUIDS WHICH COMPRISES PERCOLATING THEM THROUGH A BODY OF AGGREGATED SOIL IN WHICH THERE HAS BEEN DISPERSED A SYNTHETIC WATER-SOLUBLE POLYMER HAVING A STRUCTURE DERIVED BY THE POLYMERIZATION OF A MONO-OLEFINIC COMPOUND THROUGH ITS ALIPHATIC UNSATURATED GROUPS, AND CONTAINING HYDROPHILIC SUBSTITUENTS SELECTED FROM THE GROUP CONSISTING OF CARBOXYL, ALKALI METAL CARBOXY SALT, ALKALINE EARTH METAL CARBOXY SALT, AMMONIUM CARBOXY SALT, CARBOXY AMIDE, SULFONIC ACID SALT, TERTIARY AMINO AND HYDROXYL RADICALS, SAID POLYMERS HAVING A MOLECULAR WEIGHT OF AT LEAST 10,000 HAVING SUFFICIENT HYDROPHILIC SUBSTITUENTS TO RENDER THE SOIL AGGREGATES WATER STABLE.
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) | 1957-08-23 | 1958-02-22 | 1958-08-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-08-23 | 1962-02-22 | 1962-08-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-08-23 | 1966-02-22 | 1966-08-24 | $7700.00 | Window Closed / Lapsed |