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US3052908A
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Vacuum-type debris collector
Assignee: CENTRAL ENGINEERING Co IN
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Filing: 1961-11-10
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Granted: 1962-09-11
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Expires: 1981-11-10
Abstract
No abstract record available.
Inventors
- 👤 Daneman Ben
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 10:24
CPC Classifications
B; B65; B65F; B65F3/00; B65F3/02; B65F3/0206; B65F3/0209; E; E03; E03F; E03F7/00; E03F7/10
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
DE623871C
Cited
US1887831A
Cited
US2772438A
Cited
US2878508A
Cited
US2887714A
Cited
DE1024893B
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1965-09-10 | 1966-03-12 | 1966-09-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-09-10 | 1970-03-12 | 1970-09-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-09-10 | 1974-03-12 | 1974-09-11 | $7700.00 | Window Closed / Lapsed |