US3861887A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for controlling pollution and contamination in paint or lacquer spray booths
Assignee: Individual
•
Filing: 1973-11-01
•
Granted: 1975-01-21
•
Expires: 1993-11-01
Abstract
Abstract Water used to wash the air in paint or lacquer spray booths in order to remove over-sprayed paint or lacquers is treated with a blend of polycationic water dispersible polymer and a water soluble salt of an amphoteric metal to reduce the tackiness of paint and lacquer solids and thereby reduce the tendency of oversprayed paints and lacquers to adhere to walls, ceilings and floors of said spray booths and also to condition the paint and lacquer solids removed with the water so that they can be separated and the water recycled for further use in washing the air in the spray booth.
Inventors
- 👤 Steven W Forney
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 20:49
CPC Classifications
B; B01; B01D; B01D47/00; C; C09; C09D; C09D7/00; C09D7/71
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
29 words
A process as claimed in claim 1 in which the pH of said water containing said blend is adjusted to a pH within the range of 7.5 to 10.
Claim 2
Dependent Claim
35 words
A process as claimed in claim 1 in which said polymer has a linear chain containing carbon atoms to which are attached cationic groups selected from the group consisting of amino and quaternary amino groups.
Claim 3
Dependent Claim
15 words
A process as claimed in claim 1 in which said electrolyte salt is zinc chloride.
Claim 4
Dependent Claim
23 words
A process as claimed in claim 1 in which said polymer has an average molecular weight within the range of 500 to 5,000.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-01-20 | 1978-07-22 | 1979-01-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-01-20 | 1982-07-22 | 1983-01-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-01-20 | 1986-07-22 | 1987-01-21 | $7700.00 | Window Closed / Lapsed |