US3487937A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Sewerage treatment plant
Assignee: Convert-All Inc
•
Filing: 1967-04-26
•
Granted: 1970-01-06
•
Expires: 1987-04-26
Abstract
No abstract record available.
Inventors
- 👤 James Koulovatos
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 10:16
CPC Classifications
C; C02; C02F; C02F3/00; C02F3/02; C02F3/12; C02F3/1236; C02F3/1242; Y; Y02; Y02W; Y02W10/00; Y02W10/10
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1633079A
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US2228017A
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US2144386A
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US2233131A
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GB526545A
Cited
US2430519A
Cited
US2369232A
Cited
US2987186A
Cited
US3075645A
Cited
US3271304A
Cited
US3298526A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-01-05 | 1973-07-07 | 1974-01-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-01-05 | 1977-07-07 | 1978-01-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-01-05 | 1981-07-07 | 1982-01-06 | $7700.00 | Window Closed / Lapsed |