US1396397A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Sewage treatment
Assignee: Individual
•
Filing: 1920-07-28
•
Granted: 1921-11-08
•
Expires: 1940-07-28
Abstract
No abstract record available.
Inventors
- 👤 Warren R Borst
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 06:09
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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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1924-11-07 | 1925-05-09 | 1925-11-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1928-11-07 | 1929-05-09 | 1929-11-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1932-11-07 | 1933-05-09 | 1933-11-08 | $7700.00 | Window Closed / Lapsed |