US2379554A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of treating sewage
Assignee: Individual
•
Filing: 1941-10-01
•
Granted: 1945-07-03
•
Expires: 1961-10-01
Abstract
No abstract record available.
Inventors
- 👤 Richard G Tyler
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 18:11
CPC Classifications
C; C02; C02F; C02F3/00; C02F3/02; C02F3/12; Y; Y02; Y02W; Y02W10/00; Y02W10/10; Y10; Y10S; Y10S210/00; Y10S210/918; Y10S210/92
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) | 1948-07-02 | 1949-01-01 | 1949-07-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1952-07-02 | 1953-01-01 | 1953-07-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1956-07-02 | 1957-01-01 | 1957-07-03 | $7700.00 | Window Closed / Lapsed |