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US3422000A
Expired / Lapsed
US
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Phosphate additives in a tar sand water separation process
Assignee: ExxonMobil Technology and Engineering Co
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Filing: 1965-11-18
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Granted: 1969-01-14
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Expires: 1985-11-18
Abstract
No abstract record available.
Inventors
- 👤 John A Bichard
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 15:51
CPC Classifications
C; C10; C10G; C10G1/00; C10G1/04; C10G1/045; C10G1/047
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
CA488928A
Cited
CA602087A
Cited
US1820917A
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US2453060A
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US3152979A
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US3208930A
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US3296117A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-01-14 | 1972-07-15 | 1973-01-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-01-14 | 1976-07-15 | 1977-01-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-01-14 | 1980-07-15 | 1981-01-14 | $7700.00 | Window Closed / Lapsed |