US3853771A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for dispersing cellular micro-organisms with chelating aqueous alkaline surfactant systems
Assignee: Shell USA Inc
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Filing: 1973-03-29
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Granted: 1974-12-10
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Expires: 1993-03-29
Abstract
Abstract A contaminant composed of cellular micro-organism materials is dissolved or dispersed by contacting it with an aqueous solution containing at least one surfactant adapted to disperse the outer wall layers of micro-organism cells, at least one chelating agent adapted to disperse the inner wall layers of micro-organism cells and an alkali metal hydroxide adapted to enhance the dispersing action.
Inventors
- 👤 T Felmann
- 👤 H Carlile
- 👤 C Blankenhorn
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 16:23
CPC Classifications
C; C09; C09K; C09K8/00; C09K8/60; C09K8/84; C09K8/86; C09K8/88; C09K8/90; C09K8/905; C09K8/52; C09K8/524; Y; Y10; Y10S; Y10S507/00; Y10S507/927
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
59 words
A PROCESS FOR DISSOLVING OR DISPERSING CELLULAR MICROORGANISM MATERIALS, COMPRISING, CONTACTING SAID MATERIALS WITH AN AQUEOUS SOLUTION CONTAINING AT LEAST ONE SURFACTANT EFFECTIVE FOR DISPERSING OUTER WALL LAYERS OF MICRO-ORGANISM CELLS, AT LEAST ONE CHELATING AGENT EFFECTIVE FOR DISPERSING THE INNER ALL LAYERS OF MICRO-ORGANISM CELLS, AND AT LEAST ONE ALKALI METAL HYDROXIDE EFFECTIVE FOR ENHANCING SAID DISPERSING ACTIONS.
Claim 2
Dependent Claim
59 words
A PROCESS FOR DISSOLVING OR DISPERSING CELLULAR MICROORGANISM MATERIALS, COMPRISING, CONTACTING SAID MATERIALS WITH AN AQUEOUS SOLUTION CONTAINING AT LEAST ONE SURFACTANT EFFECTIVE FOR DISPERSING OUTER WALL LAYERS OF MICRO-ORGANISM CELLS, AT LEAST ONE CHELATING AGENT EFFECTIVE FOR DISPERSING THE INNER ALL LAYERS OF MICRO-ORGANISM CELLS, AND AT LEAST ONE ALKALI METAL HYDROXIDE EFFECTIVE FOR ENHANCING SAID DISPERSING ACTIONS.
Claim 3
Dependent Claim
27 words
The process of claim 1 in which said cellular micro-organism materials are disposed within a permeable structure; and said aqueous solution is injected into the permeable structure.
References Cited (Backward Citations)
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US3482635A
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US3528503A
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US3529666A
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US3700031A
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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) | 1977-12-09 | 1978-06-10 | 1978-12-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-12-09 | 1982-06-10 | 1982-12-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-12-09 | 1986-06-10 | 1986-12-10 | $7700.00 | Window Closed / Lapsed |