US3502575A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Treating hot water process discharge water by flocculation and vacuum precoat filtration
Assignee: Great Canadian Oil Sands Ltd
•
Filing: 1968-06-20
•
Granted: 1970-03-24
•
Expires: 1988-06-20
Abstract
No abstract record available.
Inventors
- 👤 Peter S Hepp
- 👤 Frederick W Camp
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 01:19
CPC Classifications
C; C02; C02F; C02F1/00; C02F1/66; B; B01; B01D; B01D36/00; B01D36/04; B01D37/00; B01D37/02; B01D37/03; C10; C10G; C10G1/00; C10G1/04; C10G1/045; C10G1/047
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
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) | 1973-03-23 | 1973-09-22 | 1974-03-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-03-23 | 1977-09-22 | 1978-03-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-03-23 | 1981-09-22 | 1982-03-24 | $7700.00 | Window Closed / Lapsed |