Patent US2199526A successfully refreshed from Google Patents.
Patent US4264337A successfully refreshed from Google Patents.
US4264337A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for forming a scrubbing pad
Assignee: Freudenberg Household Products LP
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Filing: 1979-06-19
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Granted: 1981-04-28
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Expires: 1999-06-19
Abstract
Abstract An improved process for coating foamed sponge material with a heat curable adhesive and abrasive mixture which comprises using as the catalyst for the adhesive, a heat activatable catalyst which resists premature curing at room or ambient temperature, but which catalyzes the adhesive at elevated temperatures within five minutes.
Inventors
- 👤 Larry A. Fenster
- 👤 Vincent F. Gudewicz
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 12:16
CPC Classifications
B; B24; B24D; B24D3/00; B24D3/02; B24D3/20; B24D3/28; B24D11/00; B24D11/001
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
89 words
A process for forming a flexible foam having a strengthened scrubbing portion comprising: (a) impregnating one surface of the foam to a depth below the scrubbing portion with a liquid, polyurethane adhesive composition and (b) thereafter, curing the adhesive composition, wherein said adhesive composition contains a heat activatable catalyst, normally in a solid state at ambient temperature, which resists premature curing, said catalyst being activated during said curing and catalyzing the hardening of said adhesive wherein the catalyst is a zinc alkanoate having from 8 to 18 carbon atoms.
Claim 2
Dependent Claim
89 words
A process for forming a flexible foam having a strengthened scrubbing portion comprising: (a) impregnating one surface of the foam to a depth below the scrubbing portion with a liquid, polyurethane adhesive composition and (b) thereafter, curing the adhesive composition, wherein said adhesive composition contains a heat activatable catalyst, normally in a solid state at ambient temperature, which resists premature curing, said catalyst being activated during said curing and catalyzing the hardening of said adhesive wherein the catalyst is a zinc alkanoate having from 8 to 18 carbon atoms.
Claim 3
Dependent Claim
15 words
The process of claim 1 wherein the adhesive composition has a particulate abrasive dispersed therein.
Claim 4
Dependent Claim
11 words
The process of claim 1 wherein the catalyst is zinc stearate.
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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) | 1984-04-27 | 1984-10-27 | 1985-04-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-04-27 | 1988-10-27 | 1989-04-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-04-27 | 1992-10-27 | 1993-04-28 | $7700.00 | Window Closed / Lapsed |