Patent US2330828A successfully refreshed from Google Patents.
US3730701A
Expired / Lapsed
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Method for controlling the growth of algae in an aqueous medium
Assignee: —
•
Filing: 1971-05-14
•
Granted: 1973-05-01
•
Expires: 1991-05-14
Abstract
Abstract A method for controlling the growth of algae in an aqueous medium by adding to the medium an effective amount of certain silyl quaternary amines. For example, a silyl quaternary amine of the formula IS ADDED TO THE LIQUID MEDIUM IN AN AMOUNT RANGING FROM 1.0 TO 10,000 MICROGRAMS PER ML. OF THE AQUEOUS MEDIUM AND AFTER A PERIOD OF FROM 2.0 TO 24 HOURS, THE ALGAE ARE FLOCCULATED WITHOUT RENDERING THE AQUEOUS MEDIUM TOXIC TO HUMANS, ANIMALS AND FISH.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 15:20
CPC Classifications
C; C02; C02F; C02F1/00; C02F1/50
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
17 words
The methods as recited in claim 1 which includes the further step of removing said flocculated algae.
Claim 2
Dependent Claim
39 words
The method as recited in claim 1 in which the R group is -C16H33, R'' is a chlorine atom, and the silyl quaternary amine compound is added in an amount of 1.0 micrograms per ml. of the aqueous medium.
Claim 3
Dependent Claim
39 words
The method as recited in claim 1 in which the R group is -C11H23, the halogen atom is bromine, and the silyl quaternary amine compound is added in an amount of 10,000 micrograms per ml. of the aqueous medium.
Claim 4
Dependent Claim
42 words
The method as recited in claim 1 in which the R group is -C12H25, the halogen atom is chlorine, and the silyl quaternary amine compound is added in an amount of from 1,000 to 10,000 micrograms per ml. of the aqueous medium.
Claim 5
Dependent Claim
42 words
The method as recited in claim 1 in which the R group is -C14H29, the halogen atom is chlorine, and the silyl quaternary amine compound is added in an amount of from 100 to 10,000 micrograms per ml. of the aqueous medium.
Claim 6
Dependent Claim
42 words
The method as recited in claim 1 in which the R group is -C18H37, the halogen atom is chlorine, and the silyl quaternary amine compound is added in an amount of from 10 to 10,000 micrograms per ml. of the aqueous medium.
Claim 7
Dependent Claim
47 words
The method as recited in claim 1 in which the R group is a mixture of -C20H41 and -C22H43, the halogen atom is chlorine, and the silyl quaternary amine compound is added in an amount of from 100 to 10,000 micrograms per ml. of the aqueous medium.
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) | 1976-04-30 | 1976-10-30 | 1977-05-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-04-30 | 1980-10-30 | 1981-05-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-04-30 | 1984-10-30 | 1985-05-01 | $7700.00 | Window Closed / Lapsed |