US1518256A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of dewatering or filtering activated sludge and producing fertilizer
Assignee: Individual
•
Filing: 1923-09-28
•
Granted: 1924-12-09
•
Expires: 1943-09-28
Abstract
No abstract record available.
Inventors
- 👤 Olier William L D
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 18:12
CPC Classifications
C; C05; C05F; C05F7/00; C05F17/00; C05F17/10; Y; Y02; Y02A; Y02A40/00; Y02A40/10; Y02A40/20; Y02P; Y02P20/00; Y02P20/141; Y02P20/145; Y02W; Y02W30/00; Y02W30/40
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) | 1927-12-09 | 1928-06-09 | 1928-12-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1931-12-09 | 1932-06-09 | 1932-12-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1935-12-09 | 1936-06-09 | 1936-12-09 | $7700.00 | Window Closed / Lapsed |