US3452966A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Liquid treatment apparatus and method
Assignee: Polcon Corp
•
Filing: 1967-08-24
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Granted: 1969-07-01
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Expires: 1987-08-24
Abstract
No abstract record available.
Inventors
- 👤 Ludwik Smolski
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 23:12
CPC Classifications
C; C02; C02F; C02F3/00; C02F3/02; C02F3/12; C02F3/22; C02F3/223; B; B01; B01F; B01F23/00; B01F23/20; B01F23/23; B01F23/232; B01F23/2323; B01F23/23231; B01F23/232311; B01F25/00; B01F25/40; B01F25/42; B01F25/43; B01F25/431; B01F25/4314; B01F35/00; B01F35/30; B01F35/32; B01F35/32005; B01F35/3203; B01F35/32015; Y; Y02; Y02W; Y02W10/00; Y02W10/10
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) | 1972-06-30 | 1972-12-30 | 1973-07-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-06-30 | 1976-12-30 | 1977-07-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-06-30 | 1980-12-30 | 1981-07-01 | $7700.00 | Window Closed / Lapsed |