US4426003A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Drain cleaner package
Assignee: Individual
•
Filing: 1982-02-08
•
Granted: 1984-01-17
•
Expires: 2002-02-08
Abstract
Abstract A drain cleaner package which reduces the hazards of handling a caustic material, such as sulfuric acid, or an aqueous alkali metal hydroxide solution in a container by providing a layer of immiscible liquid in the container above the caustic material. In a preferred embodiment, the container is a bottle with a narrowed neck.
Inventors
- 👤 Jack Zarov
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 14:30
CPC Classifications
B; B65; B65D; B65D85/00; B65D85/70; B65D85/84
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
53 words
A drain cleaner package comprising a fluid container adapted to rest on a horizontal surface and having a flat bottom and a sealable opening at the top, a body of caustic liquid within said container and a layer of immiscible liquid being of lower density than said caustic liquid and substantially inert thereto.
Claim 2
Dependent Claim
53 words
A drain cleaner package comprising a fluid container adapted to rest on a horizontal surface and having a flat bottom and a sealable opening at the top, a body of caustic liquid within said container and a layer of immiscible liquid being of lower density than said caustic liquid and substantially inert thereto.
Claim 3
Dependent Claim
15 words
The drain cleaner package of claim 1 wherein said caustic liquid is concentrated sulfuric acid.
Claim 4
Dependent Claim
19 words
The drain cleaner package of claim 1 wherein said caustic liquid is a concentrated aqueous solution of sodium hydroxide.
Claim 5
Dependent Claim
19 words
The drain cleaner package of claim 1 wherein said caustic liquid is a concentrated aqueous solution of potassium hydroxide.
Claim 6
Dependent Claim
15 words
The drain cleaner package of claim 1 wherein said immiscible liquid is a mineral oil.
Claim 7
Dependent Claim
15 words
The drain cleaner package of claim 1 wherein said immiscible liquid is a halogenated hydrocarbon.
Claim 8
Dependent Claim
16 words
The drain cleaner package of claim 1 wherein said container comprises a corrosion resistant resilient material.
Claim 9
Dependent Claim
12 words
The drain cleaner package of claim 7 wherein said container comprises polyethylene.
Claim 10
Dependent Claim
30 words
The drain cleaner package of claim 1 wherein said container comprises a substantially cylindrical bottle with a narrow neck having a length at least as great as its internal diameter.
Claim 11
Dependent Claim
21 words
The drain cleaner package of claim 1 wherein said layer of immiscible liquid is at least about 10 millimeters in thickness.
Claim 12
Dependent Claim
21 words
The drain cleaner package of claim 1 wherein said body of caustic liquid is from about 300 to about 500 milliliters.
References Cited (Backward Citations)
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1987-01-16 | 1987-07-18 | 1988-01-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-01-16 | 1991-07-18 | 1992-01-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-01-16 | 1995-07-18 | 1996-01-17 | $7700.00 | Window Closed / Lapsed |