US3761238A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Toxicant compositions for aquatic use
Assignee: 3M Co
•
Filing: 1970-04-06
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Granted: 1973-09-25
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Expires: 1990-04-06
Abstract
Abstract COMPOSITIONS COMPRISING AN INERT PARTICULATE CARRIER, THE SURFACE OF THE PARTICLES HAVING INHERENT OR EXTRINSIC ION-EXCHANGE CHARACTERISTICS, AND A NORMALLY WATER-SOLUBLE TOXICANT REVERSIBLY ADSORBED IN IONIC FORM UP SAID SURFACES. THE COMPOSITIONS ARE GREATLY IMPROVED AQUATIC PESTICIDES HAVING THE CHARACTERISTIC OF REGULATED RELEASE OF TOXICANT MEDIATED AT LEAST IN PART BY LOCAL ENVIRONMENTAL CONDITIONS INCLUDING THE PRESENCE OF THE UNDESIRABLE SPECIES WHICH IS TO BE CONTROLLED. ALSO INCLUDED ARE METHODS FOR USING THE COMPOSITIONS.
Inventors
- 👤 L Errede
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 18:06
CPC Classifications
C; C02; C02F; C02F1/00; C02F1/50; A; A01; A01N; A01N25/00; A01N25/08; B; B01; B01J; B01J47/00; B01J47/016
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-09-24 | 1977-03-26 | 1977-09-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-09-24 | 1981-03-26 | 1981-09-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-09-24 | 1985-03-26 | 1985-09-25 | $7700.00 | Window Closed / Lapsed |