US3564637A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Plastic block for revolving brush
Assignee: Harrisburg University of Science and Technology
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Filing: 1969-01-08
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Granted: 1971-02-23
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Expires: 1989-01-08
Abstract
Abstract A BLOCK FOR A REVOLVING BRUSH SUCH AS THE KIND USED IN CARPET SWEEPERS WHICH HAS SINUOUS SHAPED ELONGATED RECESSES, INTEGRALLY FORMED PULLEYS WITH RADIALLY PROJECTING RIDGES, AND BEARING HOLE CHARACTERIZED BY BEING MOLDED FROM POLYSTYRENE IN CONDITION FOR FINAL USE EXCEPT FOR THE DRILLING OF TE BRISTLE TUFT HOLES IN THE RIBS BETWEEN THE RECESSES.
Inventors
- 👤 John E Gollish
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 09:53
CPC Classifications
A; A47; A47L; A47L11/00; A47L11/40; A47L11/4036; A47L11/4041; A46; A46B; A46B13/00; A46B13/001; A47L11/32; A47L11/33
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-02-22 | 1974-08-24 | 1975-02-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-02-22 | 1978-08-24 | 1979-02-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-02-22 | 1982-08-24 | 1983-02-23 | $7700.00 | Window Closed / Lapsed |