US3386573A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for continuous recovery and separation and cleaning of grit
Assignee: Individual
•
Filing: 1967-02-21
•
Granted: 1968-06-04
•
Expires: 1987-02-21
Abstract
No abstract record available.
Inventors
- 👤 Martinak Bonifac
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 23:44
CPC Classifications
B; B24; B24C; B24C9/00; B24C9/006; Y; Y02; Y02P; Y02P70/00; Y02P70/10
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US573706A
Cited
US583899A
Cited
US1165077A
Cited
US1391073A
Cited
US1426270A
Cited
US2635750A
Cited
US2713942A
Cited
US2648532A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1971-06-04 | 1971-12-04 | 1972-06-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-06-04 | 1975-12-04 | 1976-06-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-06-04 | 1979-12-04 | 1980-06-04 | $7700.00 | Window Closed / Lapsed |