US3728156A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Large scale tank cleaning method
Assignee: Texaco Inc
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Filing: 1971-11-05
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Granted: 1973-04-17
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Expires: 1991-11-05
Abstract
Abstract A METHOD FOR CLEANING LARGE-SCALE TANKS WHICH ARE USED FOR CONTAINING PRODUCTS THAT PRODUCE EXPOLOSIVE MIXTURES UPON WASHING OUT THE RESIDUALS. THE WASHING IS DONE BY HIGH-VELOCITY SPRAYING WHICH TENDS TO CAUSE AN ELECTROSTATIC CHARGE ISBUILD UP IN THE ATMOSPHERE WHEREIN THE TANK. THE CHARGE IS NEUTRALIZED BY ALTERNATING BETWEEN WASHING FLUIDS THAT BUILD OPPOSITE POLARITY CHARGES.
Inventors
- 👤 G Miller
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 06:34
CPC Classifications
B; B63; B63B; B63B57/00; B63B57/02
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-04-16 | 1976-10-16 | 1977-04-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-04-16 | 1980-10-16 | 1981-04-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-04-16 | 1984-10-16 | 1985-04-17 | $7700.00 | Window Closed / Lapsed |