US3577229A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method and apparatus for making fertilizer
Assignee: HANS ERWIN BRUCK
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Filing: 1968-12-26
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Granted: 1971-05-04
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Expires: 1988-12-26
Abstract
Abstract IN PRODUCING A SPREADABLE GRAIN SIZE FERTILIZER FROM A MIXTURE OF GARBAGE AND FECAL MATTER THE GARBAGE IS TREATED TO PLACE IT IN A RELATIVELY SMALL GRAIN SIZE AFTER ANY METALLIC AND FIBROUS MATERIALS HAVE BEEN REMOVED, AND THE FECAL MATTER, SUCH AS IN A SEWAGE SYSE, IS TREATED TO REMOVE SOLIDS, FATS AND DETERGENTS. THE TREATED GARBAGE AND FECAL MATTER IS MIXED AS A SLUDGE AND IS BIOLOGICALLY FERMENTED AFTER WHICH WATER IS ADDED TO THE FERMENTED SLUDGE. AFTER A DRYING AND GRANULATING OPERATION, THE FERMENTED SLUDGE IS BAGGED FOR USE AS A FERTILIZER.
Inventors
- 👤 Hans-Erwin Bruck
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 23:02
CPC Classifications
C; C05; C05F; C05F3/00; C05F17/00; C05F17/40; C05F3/06; Y; Y02; Y02A; Y02A40/00; Y02A40/10; Y02A40/20; Y02E; Y02E50/00; Y02E50/30; Y02P; Y02P20/00; Y02P20/141; Y02P20/145; Y02W; Y02W30/00; Y02W30/40
Claims Analysis
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References Cited (Backward Citations)
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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) | 1974-05-03 | 1974-11-02 | 1975-05-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-05-03 | 1978-11-02 | 1979-05-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-05-03 | 1982-11-02 | 1983-05-04 | $7700.00 | Window Closed / Lapsed |