US3572128A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Dustfall sampling apparatus
Assignee: Individual
•
Filing: 1969-06-13
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Granted: 1971-03-23
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Expires: 1989-06-13
Abstract
Abstract A SERIES OF WIPERS ARE DISPOSED ABOVE A SMOOTH HORIZONTAL SURFACE THAT COLLECTS FALLING DUST. PERIODICALLY, WIPING MOVEMENT IS EFFECTED BETWEEN THE COLLECTING SURFACE AND EACH WIPER IN SUCCESSION SO THAT THE DUST IS REMOVED FROM THAT SURFACE AND RETAINED ON THE WIPER ENGAGING IT. THIS WIPER THEN IS MOVED TO A STORAGE POSITION AND THE NEXT WIPER IS MOVED TO A STORAGE POSITION AND THE FACE. MEANS ARE PROVIDED FOR REMOVING THE DUST FROM EACH SUCCESSIVE WIPER IN STORAGE POSITION AND FOR MEASURING THE QUANTITY OF DUST SO REMOVED.
Inventors
- 👤 Wesley C L Hemeon
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 12:55
CPC Classifications
G; G01; G01N; G01N1/00; G01N1/02; G01N1/04; G01N15/00; G01N15/06; G01N15/0606; G01N15/0618; G01N2001/028; G01N1/10; G01N2001/1006
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) | 1974-03-22 | 1974-09-21 | 1975-03-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-03-22 | 1978-09-21 | 1979-03-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-03-22 | 1982-09-21 | 1983-03-23 | $7700.00 | Window Closed / Lapsed |