US3219577A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Biological oxidation
Assignee: Dow Chemical Co
•
Filing: 1963-09-26
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Granted: 1965-11-23
•
Expires: 1983-09-26
Abstract
No abstract record available.
Inventors
- 👤 Iii Thomas J Powers
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 20:34
CPC Classifications
C; C02; C02F; C02F3/00; C02F3/02; C02F3/10; Y; Y02; Y02W; Y02W10/00; Y02W10/10; Y10; Y10S; Y10S261/00; Y10S261/72
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
114 words
IN A METHOD FOR THE OPERATION OF A GAS-LIQUID CONTACT APPARATUS FOR THE BIOLOGICAL OXIDATION OF ORGANIC WASTE MATERIALS WHEREIN WATER CONTAINING WASTE MATERIALS IS DISTRIBUTED OVER A SUPPORT MEDIUM WHICH HAS ON ITS SURFACES A BIOLOGICAL GROWTH CAPABLE OF OXIDIZING THE UNDESIRED ORGANIC WASTE MATERIALS WITHIN THE WATER IN THE PRESENCE OF AIR, THE IMPROVEMENT WHICH COMPRISES DISPOSING AS THE SUPPORT MEDIUM A PLURALITY OF VERTICAL, SPACED APART, PARALLEL, LATERALLY UNSUPPORTED FILAMENTS AND DISPOSING SAID BIOLOGICAL GROWTH ON EACH OF THE FILAMENTS OF THE SUPPORT MEDIUM IN A GENERALLY FILAMENTARY CONFIGURATION WHEREIN A PLURALITY OF GENERALLY VERTICALY DISPOSED SPACED APART, PARALLEL, LATERALLY UNSUPPORTED, AND INTERNALLY SUPPORTED FILAMENTS OF SAID BIOLOGICAL GROWTH ARE PROVIDED.
Claim 2
Dependent Claim
114 words
IN A METHOD FOR THE OPERATION OF A GAS-LIQUID CONTACT APPARATUS FOR THE BIOLOGICAL OXIDATION OF ORGANIC WASTE MATERIALS WHEREIN WATER CONTAINING WASTE MATERIALS IS DISTRIBUTED OVER A SUPPORT MEDIUM WHICH HAS ON ITS SURFACES A BIOLOGICAL GROWTH CAPABLE OF OXIDIZING THE UNDESIRED ORGANIC WASTE MATERIALS WITHIN THE WATER IN THE PRESENCE OF AIR, THE IMPROVEMENT WHICH COMPRISES DISPOSING AS THE SUPPORT MEDIUM A PLURALITY OF VERTICAL, SPACED APART, PARALLEL, LATERALLY UNSUPPORTED FILAMENTS AND DISPOSING SAID BIOLOGICAL GROWTH ON EACH OF THE FILAMENTS OF THE SUPPORT MEDIUM IN A GENERALLY FILAMENTARY CONFIGURATION WHEREIN A PLURALITY OF GENERALLY VERTICALY DISPOSED SPACED APART, PARALLEL, LATERALLY UNSUPPORTED, AND INTERNALLY SUPPORTED FILAMENTS OF SAID BIOLOGICAL GROWTH ARE PROVIDED.
References Cited (Backward Citations)
US278986A
Cited
GB190125993A
Cited
FR418272A
Cited
GB104163A
Cited
GB357712A
Cited
US3113102A
Cited
US3112261A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1968-11-22 | 1969-05-24 | 1969-11-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-11-22 | 1973-05-24 | 1973-11-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-11-22 | 1977-05-24 | 1977-11-23 | $7700.00 | Window Closed / Lapsed |