US3401114A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process using coal in sewage treatment
Assignee: Rand Development Corp
•
Filing: 1965-10-15
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Granted: 1968-09-10
•
Expires: 1985-10-15
Abstract
No abstract record available.
Inventors
- 👤 Stuart S Carlton
- 👤 Bertram C Raynes
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 02:18
CPC Classifications
C; C02; C02F; C02F1/00; C02F1/28; C02F1/283; Y; Y10; Y10S; Y10S210/00; Y10S210/902; Y10S210/908; Y10S210/909
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1971-09-10 | 1972-03-11 | 1972-09-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-09-10 | 1976-03-11 | 1976-09-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-09-10 | 1980-03-11 | 1980-09-10 | $7700.00 | Window Closed / Lapsed |