Patent Assignment Details
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For pending or abandoned applications please consult USPTO staff.
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| Reel/Frame: | 004658/0062 | |
| Pages: | 2 |
| | Recorded: | 01/07/1987 | | |
| Conveyance: | ASSIGNS TO EACH ASSIGNEE THE INTEREST OPPOSITE THEIR RESPECTIVE NAME |
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Total properties:
1
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Patent #:
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Issue Dt:
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04/23/1991
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Application #:
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07001258
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Filing Dt:
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01/07/1987
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Title:
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MONITORING SURFACTANT CONTENT TO CONTROL HOT WATER PROCESS FOR TAR SAND
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Assignees
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| 2400, 639-5TH AVENUE SOUTH WEST |
| CALGARY, ALBERTA, T2P 0M9 (10.00%), CANADA |
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| 1500, 635- 8 AVENUE SOUTH WEST |
| CALGARY, ALBERTA, T2P 3Z1 (13.23%), CANADA |
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| 237 FOURTH AVENUE SOUTH WEST |
| ESSO PLAZA |
| CALGARY, ALBERTA, T2P OHG, (25.00%), CANADA |
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Correspondence name and address
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E. PETER JOHNSON
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508 PRINCIPAL PLAZA
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10303 JASPER AVE.
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EDMONSTON, ALBERTA T5J 3N6
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