Method and apparatus for clearing flora from sewer lines

Details Method and apparatus for clearing flora from sewer lines Method and apparatus for clearing flora from sewer lines

1989-11-13

1991-11-05

Robinson, Allen J.

Chemistry: fertilizers

Processes and products

Forms or conditioning

71 76, 71 79, 71 97, 71DIG1, A01N 2516, A01N 5502

Patent

active

050628780

ABSTRACT:
The present invention includes a herbicide having a phytocidal effect on roots and the like, and a foaming agent. The foaming agent consists of a gas releasing compound and a surfactant or detergent. To inhibit the growth of flora in or around sewer lines this mixture may be flushed into a sewer line. The gas releasing compound causes the surfactant or detergent to foam, and the foam acts as a carrier of the herbicide through the sewer line. Roots or the like growing within the sewer line are coated with the herbicide carrying foaming agent.

REFERENCES:
patent: 2397328 (1946-03-01), Ripley
patent: 3197302 (1965-06-01), MacBride
patent: 3741807 (1971-03-01), Horne
patent: 4425154 (1984-01-01), Meyer et al.
Applicant's acknowledged prior art, Ser. No. 07/436,071, pp. 1, 2, and 7, instant specification.

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