US3391789A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Waste treatment apparatus
Assignee: Industrial Filter and Pump Manufacturing Co
•
Filing: 1965-06-11
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Granted: 1968-07-09
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Expires: 1985-06-11
Abstract
No abstract record available.
Inventors
- 👤 James F Zievers
- 👤 Clay W Riley
- 👤 Richard W Crain
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 17:25
CPC Classifications
C; C02; C02F; C02F1/00; C02F1/68; C02F1/685; C02F1/686; C01; C01C; C01C3/00; C01C3/20; C01G; C01G37/00; C01G37/02; C02F2101/00; C02F2101/10; C02F2101/16; C02F2101/18; C02F2101/20; C02F2101/22
Claims Analysis
Total Claims: 0
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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) | 1971-07-09 | 1972-01-08 | 1972-07-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-07-09 | 1976-01-08 | 1976-07-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-07-09 | 1980-01-08 | 1980-07-09 | $7700.00 | Window Closed / Lapsed |