US3677936A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Liquid treatment method
Assignee: ABRAHAM G BASTIAANSE
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Filing: 1971-03-10
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Granted: 1972-07-18
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Expires: 1991-03-10
Abstract
Abstract A SYSTEM FOR TREATING LIQUID BODIES WITH A GAS EMPLOYS A DIFFUSION MEMBER THAT COMPRISES A HOSE OF RELATIVELY RESILIENT MATERIAL HAVING FORMED THEREIN A MULTIPLICITY OF MINUTE, NORMALLY CLOSED PERFORATIONS. THE PERFORATIONS EXTEND THROUGH THE WALL OF THE HOSE AT AN ANGLE THAT IS AT LEAST 25 DEGREES FROM NORMAL TO THE SURFACE THEREOF, AND THEY ARE PRODUCED WITH THE REMOVAL OF SUBSTANTIALLY NO MATERIAL.
Inventors
- 👤 Abraham G Bastiaanse
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 23:53
CPC Classifications
C; C02; C02F; C02F3/00; C02F3/02; C02F3/12; C02F3/20; C02F3/201; B; B01; B01F; B01F23/00; B01F23/20; B01F23/23; B01F23/231; B01F23/23105; B01F23/2312; B01F23/23124; B01F23/231241; B01F23/23126; B01F23/231265; E; E02; E02B; E02B1/00; E02B1/003; Y; Y02; Y02W; Y02W10/00; Y02W10/10
Claims Analysis
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References Cited (Backward Citations)
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-07-18 | 1976-01-17 | 1976-07-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-07-18 | 1980-01-17 | 1980-07-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-07-18 | 1984-01-17 | 1984-07-18 | $7700.00 | Window Closed / Lapsed |