US3530067A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of treating sewage
Assignee: FMC Corp
•
Filing: 1968-06-06
•
Granted: 1970-09-22
•
Expires: 1988-06-06
Abstract
No abstract record available.
Inventors
- 👤 Louis D Friedman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 10:21
CPC Classifications
C; C02; C02F; C02F3/00; C02F3/02; C02F3/025; C02F1/00; C02F1/72; C02F1/722; Y; Y02; Y02W; Y02W10/00; Y02W10/10
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2576442A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-09-21 | 1974-03-23 | 1974-09-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-09-21 | 1978-03-23 | 1978-09-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-09-21 | 1982-03-23 | 1982-09-22 | $7700.00 | Window Closed / Lapsed |