Patent US4420463A successfully refreshed from Google Patents.
US4420463A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Dry chemical feed system
Assignee: ChampionX LLC
•
Filing: 1982-02-22
•
Granted: 1983-12-13
•
Expires: 2002-02-22
Abstract
Abstract An apparatus for feeding slowly soluble water-soluble chemicals into the basin of a cooling tower which contains water. The device comprises a rigid mesh cylindrical drum having a bottom, sides, and an open top. It has at least one vertically positioned, spaced-apart fastening member positioned along the inside of the drum. Inside the drum is a plastic mesh bag, adapted to receive solid, slowly soluble water-soluble chemicals. This bag is affixed to a fastening member. Also, there are means positioned at the top of the plastic mesh cylindrical drum for suspending it below the water level of the basin of a cooling tower.
Inventors
- 👤 Frances C. Pocius
- 👤 William T. Buchanan
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 21:49
CPC Classifications
C; C02; C02F; C02F1/00; C02F1/68; C02F1/685; C02F1/688; B; B01; B01F; B01F21/00; B01F21/20; B01F21/22; B01F21/221; Y; Y10; Y10S; Y10S261/00; Y10S261/11; Y10S261/46
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
88 words
An apparatus for feeding slowly soluble water-souble chemicals into the basin of a cooling tower which contains water which comprises a rigid mesh cyindrical drum having a bottom, sides, and an open top, vertically, spaced-apart hooks positioned along the inside of the drum, a plastic mesh bag which contains solid, slowly soluble water-soluble chemicals affixed to one or more of said hooks, and means positioned at the top of the rigid mesh cylindrical drum for suspending it below the water level of the basin of a cooling tower.
Claim 2
Independent Claim
88 words
An apparatus for feeding slowly soluble water-souble chemicals into the basin of a cooling tower which contains water which comprises a rigid mesh cyindrical drum having a bottom, sides, and an open top, vertically, spaced-apart hooks positioned along the inside of the drum, a plastic mesh bag which contains solid, slowly soluble water-soluble chemicals affixed to one or more of said hooks, and means positioned at the top of the rigid mesh cylindrical drum for suspending it below the water level of the basin of a cooling tower.
Claim 3
Dependent Claim
18 words
The apparatus of claim 1 where the rigid mesh cylindrical drum is formed of a non-toxic, non-corrosive material.
Claim 4
Dependent Claim
23 words
The apparatus of claim 2 where the non-toxic, non-corrosive material is a plastic from the group consisting of polypropylene, polyvinyl chloride, and polyethylene.
Claim 5
Dependent Claim
13 words
The apparatus of claim 2 where the non-toxic, non-corrosive material is stainless steel.
References Cited (Backward Citations)
US1874091A
Cited
US2072976A
Cited
US2329429A
Cited
US3120491A
Cited
US3332871A
Cited
US3476520A
Cited
US3846078A
Cited
US4005010A
Cited
US3853481A
Cited
US4217331A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1986-12-12 | 1987-06-13 | 1987-12-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1990-12-12 | 1991-06-13 | 1991-12-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1994-12-12 | 1995-06-13 | 1995-12-13 | $7700.00 | Window Closed / Lapsed |