Patent US3533775A successfully refreshed from Google Patents.
US3533775A
Expired / Lapsed
US
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Process for aerobically preparing fertilizer from a mixture of municipal waste containing paper with sewage sludge
Assignee: Metropolitan Waste Conversion Corp
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Filing: 1966-10-21
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Granted: 1970-10-13
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Expires: 1986-10-21
Abstract
No abstract record available.
Inventors
- 👤 Victor Brown
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 21:21
CPC Classifications
C; C05; C05F; C05F7/00; Y; Y02; Y02A; Y02A40/00; Y02A40/10; Y02A40/20
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1980244A
Cited
US2285834A
Cited
US2220134A
Cited
US2798800A
Cited
US3113014A
Cited
US3385687A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-10-12 | 1974-04-13 | 1974-10-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-10-12 | 1978-04-13 | 1978-10-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-10-12 | 1982-04-13 | 1982-10-13 | $7700.00 | Window Closed / Lapsed |