US2809933A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Biological purification system
Assignee: Individual
•
Filing: 1953-12-23
•
Granted: 1957-10-15
•
Expires: 1973-12-23
Abstract
No abstract record available.
Inventors
- 👤 Halvorson Halvor Orin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 11:44
CPC Classifications
C; C02; C02F; C02F3/00; C02F3/02; C02F3/12; C02F3/1205; C02F3/121; C02F3/025; C02F3/26; Y; Y02; Y02W; Y02W10/00; Y02W10/10; Y10; Y10S; Y10S210/00; Y10S210/918
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
87 words
IN THE METHOD OF TREATING A WASTE PRODUCT CONTAINING SUBSTANTIAL AMOUNT OF AUTO-OXIDIZABLE COMPOUNDS AND OF BIOLOGICALLY OXIDIZABLE ORGANIC MATTER, THE STEPS OF CONTACTING SAID WASTE PRODUCT WITH AVAILABLE OXYGEN UNDER VIGOROUS AGITATION IN A FIRST TREATING ZONE IN THE SUBSTANTIAL ABSENCE OF BIOLOGICALLY ACTIVE AEROBIC BACTERIA, SAID TREATING ZONE BEING AT A SUPER-ATMOSPHERIC PRESSURE, TO MAINTAIN THE OXYGEN CONCENTRATION OF SAID WASTE PRODUCT AT A LEVAL IN EXCESS OF THAT EQUIVALENT TO 8 PARTS OF OXYGEN PER MILLION PARTS OF WASTE PRODUCT AT 27*C. AND ATMOS-
Claim 2
Dependent Claim
87 words
IN THE METHOD OF TREATING A WASTE PRODUCT CONTAINING SUBSTANTIAL AMOUNT OF AUTO-OXIDIZABLE COMPOUNDS AND OF BIOLOGICALLY OXIDIZABLE ORGANIC MATTER, THE STEPS OF CONTACTING SAID WASTE PRODUCT WITH AVAILABLE OXYGEN UNDER VIGOROUS AGITATION IN A FIRST TREATING ZONE IN THE SUBSTANTIAL ABSENCE OF BIOLOGICALLY ACTIVE AEROBIC BACTERIA, SAID TREATING ZONE BEING AT A SUPER-ATMOSPHERIC PRESSURE, TO MAINTAIN THE OXYGEN CONCENTRATION OF SAID WASTE PRODUCT AT A LEVAL IN EXCESS OF THAT EQUIVALENT TO 8 PARTS OF OXYGEN PER MILLION PARTS OF WASTE PRODUCT AT 27*C. AND ATMOS-
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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) | 1960-10-14 | 1961-04-15 | 1961-10-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-10-14 | 1965-04-15 | 1965-10-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-10-14 | 1969-04-15 | 1969-10-15 | $7700.00 | Window Closed / Lapsed |