US3751364A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of protecting metal surfaces against abrasive wear in pumps with polyquaternaries
Assignee: Baker Petrolite LLC
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Filing: 1971-04-15
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Granted: 1973-08-07
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Expires: 1991-04-15
Abstract
Abstract SOLUTIONS OF WATER SOLUBLE AND/OR DISPERSIBLE POLYQUATERNARY, POLYMERIZED, OXYALKYLATED AMINES NOT ONLY OFFER PROTECTION AGAINST ABRASIVE WEAR TO SUBMERGED METAL SURFACES, SUCH AS IN SUBMERSIBLE OIL WELL PUMPS, BUT ALSO THROUGH THEIR ANTI-BACTERIAL AND CORROSION INHIBITING ACTION OFFER PROTECTION AGAINST CORROSIONS AND BACTERIAL DETERIORATION OF THE PUMP. IN ADDITION, BECAUSE OF INCREASED WATER VISCOSITY, THEY ALSO REDUCE FOAMING AND CAVITATION DURING PUMPLING.
Inventors
- 👤 T Bellos
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 15:37
CPC Classifications
C; C10; C10M; C10M173/00; C10M173/02; A; A01; A01N; A01N33/00; A01N33/02; A01N33/12; C23; C23F; C23F11/00; C23F11/08; C23F11/10; C23F11/14; C23F11/141; C23F11/142; C10M2201/00; C10M2201/02; C10M2201/06; C10M2201/061; C10M2201/08; C10M2201/081; C10M2201/082; C10M2201/084; C10M2201/16; C10M2201/18; C10M2215/00; C10M2215/02; C10M2215/04; C10M2215/042; C10N; C10N2040/00; C10N2040/08; C10N2050/00; C10N2050/01
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) | 1976-08-06 | 1977-02-05 | 1977-08-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-08-06 | 1981-02-05 | 1981-08-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-08-06 | 1985-02-05 | 1985-08-07 | $7700.00 | Window Closed / Lapsed |