Patent US3397789A successfully refreshed from Google Patents.
US3397789A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Sewage treatment system
Assignee: Pacific Flush Tank Co
•
Filing: 1966-10-20
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Granted: 1968-08-20
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Expires: 1986-10-20
Abstract
No abstract record available.
Inventors
- 👤 Joe M Valdespino
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 23:44
CPC Classifications
C; C02; C02F; C02F3/00; C02F3/02; C02F3/12; Y; Y02; Y02W; Y02W10/00; Y02W10/10
Claims Analysis
Total Claims: 0
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1971-08-20 | 1972-02-19 | 1972-08-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-08-20 | 1976-02-19 | 1976-08-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-08-20 | 1980-02-19 | 1980-08-20 | $7700.00 | Window Closed / Lapsed |