US3464919A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of concentration of organic sludges
Assignee: Czech Academy of Sciences
•
Filing: 1967-04-13
•
Granted: 1969-09-02
•
Expires: 1987-04-13
Abstract
No abstract record available.
Inventors
- 👤 Dobromil Vesley
- 👤 Jiri Barta
- 👤 Jiri Hanzlicek
- 👤 Miroslab Verner
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 22:23
CPC Classifications
C; C02; C02F; C02F3/00; C02F3/30; C02F3/34; Y; Y10; Y10S; Y10S435/00; Y10S435/8215; Y10S435/822; Y10S435/874
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2615842A
Cited
US2975122A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-09-01 | 1973-03-03 | 1973-09-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-09-01 | 1977-03-03 | 1977-09-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-09-01 | 1981-03-03 | 1981-09-02 | $7700.00 | Window Closed / Lapsed |