US4197937A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Non-ionic emulsifying release agent for bituminous sands conveyor belt
Assignee: Ontario Energy Corp
•
Filing: 1977-11-01
•
Granted: 1980-04-15
•
Expires: 1997-11-01
Abstract
Abstract An aqueous solution suspension or emulsion containing a water-soluble or oil-soluble non-ionic emulsifying agent is useful, when spread over the load-bearing surface of a conveyor carrying bituminous sands, to act as a release agent to promote the clean separation of the tacky sands from the belt when the latter rounds the end roller of the conveyor system and unloads the sands.
Inventors
- 👤 Emerson Sanford
- 👤 Robert Shaw
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 17:31
CPC Classifications
C; C10; C10C; C10C3/00; C10C3/007; C10G; C10G1/00; C10G1/04; C10G1/047; Y; Y10; Y10T; Y10T428/00; Y10T428/28; Y10T428/2839
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
101 words
In the process wherein bituminous sands are deposited on and transported by an endless conveyor belt to its end, where the sands are unloaded as the belt rounds the end roller and are subsequently subjected to a hot water extraction process, the improvement comprising: applying to the sands-bearing surface of the belt an aqueous solution, suspension or emulsion of alypoprylic, non-ionic emulsifying agent, prior to depositing the bituminous sands thereon, to provide a release agent which is operative to effect clean separation of the sands from the surface during the unloading operation without significant deleterious effect on the downstream extraction process.
Claim 2
Dependent Claim
101 words
In the process wherein bituminous sands are deposited on and transported by an endless conveyor belt to its end, where the sands are unloaded as the belt rounds the end roller and are subsequently subjected to a hot water extraction process, the improvement comprising: applying to the sands-bearing surface of the belt an aqueous solution, suspension or emulsion of alypoprylic, non-ionic emulsifying agent, prior to depositing the bituminous sands thereon, to provide a release agent which is operative to effect clean separation of the sands from the surface during the unloading operation without significant deleterious effect on the downstream extraction process.
Claim 3
Dependent Claim
49 words
The improvement set forth in claim 1 wherein the aqueous solution, suspension or emulsion contains a concentration of emulsifying agent such that when the mixture is applied to the conveyor belt emulsifier is added in the range 1000 to 10,000 parts of emulsifier for every million parts of water.
References Cited (Backward Citations)
US1559289A
Cited
US1904341A
Cited
US2009028A
Cited
US2440626A
Cited
US3529868A
Cited
US3819793A
Cited
US3813280A
Cited
FR2307733A1
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1983-04-15 | 1983-10-15 | 1984-04-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1987-04-15 | 1987-10-15 | 1988-04-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1991-04-15 | 1991-10-15 | 1992-04-15 | $7700.00 | Window Closed / Lapsed |