US4844745A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Novel cleaning composition for removal of PCBS
Assignee: Integrated Chemistries Inc
•
Filing: 1988-10-12
•
Granted: 1989-07-04
•
Expires: 2008-10-12
Abstract
Abstract Removal and/or clean-up of polychlorinated biphenyls (PCBs) from contaminated surfaces with novel compositions of petroleum distillates and wetting agents.
Inventors
- 👤 James E. Nash
- 👤 Kurt E. Heikkila
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 22:12
CPC Classifications
C; C11; C11D; C11D7/00; C11D7/22; C11D7/26; C11D7/261; C11D7/50; C11D7/5004; C11D7/5013; C11D9/00; C11D9/04; C11D9/06; C11D9/08; C11D9/10; C11D9/14; C11D9/22; C11D9/24; C11D9/32; C11D7/263; C11D7/32; Y; Y10; Y10S; Y10S210/00; Y10S210/902; Y10S210/908; Y10S210/909
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
187 words
The method of polychlorinated biphenyl cleanup comprising: (1) providing a quantity of a composition selected from the group consisting of ______________________________________
Component Weight %
______________________________________
(a) a composition comprising
Solvent mixture about 58.0
Monobutyl Ether Ethylene Glycol
about 6.5
Cyclohexanol about 4.0
Potassium Tall Oil about 13.0
Monoethanolamine about 8.0
Sulfonic Acid (neutralized)
about 8.0
Sodium Metasilicate Pentahydrate
about 0.5
Tetrapotassium Pyrophosphate
about 2.5
said solvent mixture consists of: 6.2% C.sub.9,
67.5% C.sub.10, 10.3% C.sub.11 and 0.7% C.sub.12 alkyl
benzenes, 15.0% indanes and tetralines and
balance other aromatic hydrocarbons
(b) a composition comprising
Solvent Mixture about 7.5
Ethylene Glycol Monobutyl Ether
about 1.0
Cyclohexanol about 0.5
Potassium Tall Oil about 1.5
Monoethanolamine about 1.0
Sulfonic Acid (neutralized)
about 1.0
Sodium Metasilicate Pentahydrate
about 0.1
Tetrapotassium Pyrophosphate
about 0.4
Water about 87.0
said solvent mixture consists of: 6.2% C.sub.9,
67.5% C.sub.10, 10.3% C.sub.11 and 0.7% C.sub.12 alkyl
benzenes, 15.0% indanes and tetralines and
balance other aromatic hydrocarbons
______________________________________ (2) aerating the composition to form a foam, (3) applying the foam for a time to the surface to be cleaned, (4) removing the foam, and (5) rinsing the surface.
Claim 2
Independent Claim
187 words
The method of polychlorinated biphenyl cleanup comprising: (1) providing a quantity of a composition selected from the group consisting of ______________________________________
Component Weight %
______________________________________
(a) a composition comprising
Solvent mixture about 58.0
Monobutyl Ether Ethylene Glycol
about 6.5
Cyclohexanol about 4.0
Potassium Tall Oil about 13.0
Monoethanolamine about 8.0
Sulfonic Acid (neutralized)
about 8.0
Sodium Metasilicate Pentahydrate
about 0.5
Tetrapotassium Pyrophosphate
about 2.5
said solvent mixture consists of: 6.2% C.sub.9,
67.5% C.sub.10, 10.3% C.sub.11 and 0.7% C.sub.12 alkyl
benzenes, 15.0% indanes and tetralines and
balance other aromatic hydrocarbons
(b) a composition comprising
Solvent Mixture about 7.5
Ethylene Glycol Monobutyl Ether
about 1.0
Cyclohexanol about 0.5
Potassium Tall Oil about 1.5
Monoethanolamine about 1.0
Sulfonic Acid (neutralized)
about 1.0
Sodium Metasilicate Pentahydrate
about 0.1
Tetrapotassium Pyrophosphate
about 0.4
Water about 87.0
said solvent mixture consists of: 6.2% C.sub.9,
67.5% C.sub.10, 10.3% C.sub.11 and 0.7% C.sub.12 alkyl
benzenes, 15.0% indanes and tetralines and
balance other aromatic hydrocarbons
______________________________________ (2) aerating the composition to form a foam, (3) applying the foam for a time to the surface to be cleaned, (4) removing the foam, and (5) rinsing the surface.
References Cited (Backward Citations)
US4792413A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1992-07-03 | 1993-01-02 | 1993-07-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1996-07-03 | 1997-01-02 | 1997-07-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2000-07-03 | 2001-01-02 | 2001-07-04 | $7700.00 | Window Closed / Lapsed |