Patent US4675646A successfully refreshed from Google Patents.
Patent US4055029A successfully refreshed from Google Patents.
US4055029A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Cleaning, scouring and/or polishing pads
Assignee: Individual
•
Filing: 1976-03-01
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Granted: 1977-10-25
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Expires: 1996-03-01
Abstract
Abstract In a cleaning, scrubbing or polishing pad of the type formed from a pliable, flexible foamed plastic body having a scrubbing surface, the improvement of a plurality of protuberances on the scrubbing surface, each of the protuberances being defined by peripheral surfaces generally perpendicular to and forming generally sharp edges with an upper scrubbing surface of the protuberance.
Inventors
- 👤 Heinz Kalbow
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 18:51
CPC Classifications
B; B24; B24B; B24B37/00; B24B37/11; B24B37/20; B24B37/26; A; A47; A47L; A47L13/00; A47L13/10; A47L13/16; B24D; B24D11/00; B24D11/001; B24D11/005
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
124 words
In a cleaning or polishing pad comprising a pliable flexible plastic body having open cells and a scrubbing surface, the improvement comprising: a plurality of protuberances on said scrubbing surface, each of said protuberances being defined by peripheral surfaces generally perpendicular to and forming generally sharp edges with an upper scrubbing surface of said protuberance; said sharp edges have given dimensions and said protuberances have a given height, with said dimensions being substantially greater than said height; said surface includes grooves between adjacent protuberances, each of said grooves having a depth and a breadth, said depth being substantially greater than said breadth; an abrasive layer on said upper scrubbing surfaces of said protuberances, said abrasive layer includes a particulate abrasive embedded in an adhesive.
Claim 2
Dependent Claim
124 words
In a cleaning or polishing pad comprising a pliable flexible plastic body having open cells and a scrubbing surface, the improvement comprising: a plurality of protuberances on said scrubbing surface, each of said protuberances being defined by peripheral surfaces generally perpendicular to and forming generally sharp edges with an upper scrubbing surface of said protuberance; said sharp edges have given dimensions and said protuberances have a given height, with said dimensions being substantially greater than said height; said surface includes grooves between adjacent protuberances, each of said grooves having a depth and a breadth, said depth being substantially greater than said breadth; an abrasive layer on said upper scrubbing surfaces of said protuberances, said abrasive layer includes a particulate abrasive embedded in an adhesive.
Claim 3
Dependent Claim
16 words
The improvement as defined in claim 1 wherein said depth is approximately 1.5-3.0 times said breadth.
Claim 4
Dependent Claim
111 words
In a cleaning or polishing pad comprising a pliable flexible plastic body having open cells and a scrubbing surface, the improvement comprising: a plurality of protuberances on said scrubbing surface, each of said protuberances being defined by peripheral surfaces generally perpendicular to and forming generally sharp edges with an upper scrubbing surface of said protuberance; said sharp edges have given dimensions and said protuberances have a given height, with said dimensions being substantially greater than said height; an abrasive layer on said upper scrubbing surfaces of said protuberances, said abrasive layer includes a powdered foam plastic which is more hard than the foamed plastic of said body embedded in an adhesive.
Claim 5
Dependent Claim
111 words
In a cleaning or polishing pad comprising a pliable flexible plastic body having open cells and a scrubbing surface, the improvement comprising: a plurality of protuberances on said scrubbing surface, each of said protuberances being defined by peripheral surfaces generally perpendicular to and forming generally sharp edges with an upper scrubbing surface of said protuberance; said sharp edges have given dimensions and said protuberances have a given height, with said dimensions being substantially greater than said height; an abrasive layer on said upper scrubbing surfaces of said protuberances, said abrasive layer includes a powdered foam plastic which is more hard than the foamed plastic of said body embedded in an adhesive.
Claim 6
Dependent Claim
25 words
The improvement as defined in claim 3 wherein said powdered foam plastic has a grain size of from about 50 microns to about 500 microns.
Claim 7
Dependent Claim
23 words
The improvement as defined in claim 3 wherein said powdered foam plastic has a grain size of from 100 microns to 200 microns.
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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) | 1980-10-24 | 1981-04-25 | 1981-10-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-10-24 | 1985-04-25 | 1985-10-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-10-24 | 1989-04-25 | 1989-10-25 | $7700.00 | Window Closed / Lapsed |