Patent US3395800A successfully refreshed from Google Patents.
US3395800A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Sewage treatment and apparatus therefor
Assignee: EDWIN B FALL JR
•
Filing: 1965-07-23
•
Granted: 1968-08-06
•
Expires: 1985-07-23
Abstract
No abstract record available.
Inventors
- 👤 Leon S Kraus
- 👤 Jr Edwin B Fall
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 16:50
CPC Classifications
B; B01; B01D; B01D21/00; B01D21/0018; B01D21/0087; B01D21/02; B01D21/04; B01D21/06; B01D21/24; B01D21/2405; B01D21/2427; B01D21/2433; B01D21/2438
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US1076721A
Cited
US1081329A
Cited
US1493861A
Cited
US1921689A
Cited
US1938894A
Cited
US2069024A
Cited
US2098463A
Cited
US2249049A
Cited
US2467003A
Cited
US2647733A
Cited
US2821306A
Cited
US2894637A
Cited
US3036715A
Cited
US3228530A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1971-08-06 | 1972-02-05 | 1972-08-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-08-06 | 1976-02-05 | 1976-08-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-08-06 | 1980-02-05 | 1980-08-06 | $7700.00 | Window Closed / Lapsed |