US3451552A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Treatment unit for contaminated effluent
Assignee: GORDON R CARLSON
•
Filing: 1967-08-09
•
Granted: 1969-06-24
•
Expires: 1987-08-09
Abstract
No abstract record available.
Inventors
- 👤 Gordon R Carlson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 11:41
CPC Classifications
C; C02; C02F; C02F1/00; C02F1/68; C02F1/685; C02F1/688; B; B01; B01F; B01F21/00; B01F21/20; B01F21/22; B01F25/00; B01F25/40; B01F25/42; B01F25/421; B01F25/423; B01F25/4233; C02F1/72; C02F1/76; C02F2103/00; C02F2103/005
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US360455A
Cited
US3123555A
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US691365A
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US753880A
Cited
US890301A
Cited
US2486691A
Cited
US2676666A
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US2798228A
Cited
US2820701A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-06-23 | 1972-12-23 | 1973-06-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-06-23 | 1976-12-23 | 1977-06-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-06-23 | 1980-12-23 | 1981-06-24 | $7700.00 | Window Closed / Lapsed |