US3177056A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for making a porous abrasive body and product thereof
Assignee: Kalle GmbH and Co KG
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Filing: 1962-04-11
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Granted: 1965-04-06
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Expires: 1982-04-11
Abstract
No abstract record available.
Inventors
- 👤 Hofelmann Hans
- 👤 Braun Robert
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 14:39
CPC Classifications
B; B24; B24D; B24D3/00; B24D3/02; B24D3/20; B24D3/28; B24D3/32; B24D18/00; B24D3/30
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
71 words
A PROCESS FOR MAKING A POROUS ABRASIVE ARTICLE WHICH COMPRISES FOAMING AN AQUEOUS REACTION MIXTURE COMPRISING POLYVINYL ALCOHOL, FORMALDEHYDE, AN ACID CATALYST, A FINELY DIVIDED THERMOPLASTIC MATERIAL, AND AN ABRASIVE PRESENT IN AN EFFECTIVE AMOUNT OF AT LEAST THREE TIMES AS MUCH ABRASIVE, BY WEIGHT, AS THT TOTAL WEIGHT OF POLYVINYL ALCOHOL AND FINELY-DIVIDED THERMOPLASTIC MATERIAL, SETTING THE RESULTING FOAM IN A MOLD, AND WASHING AND DRYING THE MOLDED POROUS ARTICLE.
Claim 2
Dependent Claim
71 words
A PROCESS FOR MAKING A POROUS ABRASIVE ARTICLE WHICH COMPRISES FOAMING AN AQUEOUS REACTION MIXTURE COMPRISING POLYVINYL ALCOHOL, FORMALDEHYDE, AN ACID CATALYST, A FINELY DIVIDED THERMOPLASTIC MATERIAL, AND AN ABRASIVE PRESENT IN AN EFFECTIVE AMOUNT OF AT LEAST THREE TIMES AS MUCH ABRASIVE, BY WEIGHT, AS THT TOTAL WEIGHT OF POLYVINYL ALCOHOL AND FINELY-DIVIDED THERMOPLASTIC MATERIAL, SETTING THE RESULTING FOAM IN A MOLD, AND WASHING AND DRYING THE MOLDED POROUS ARTICLE.
Claim 3
Dependent Claim
41 words
A POROUS ABRASIVE ARTICLE COMPRISING A BINDER OF POLYVINYL FORMAL AND A DISPERSED THERMOPLASTIC MATERIAL, AND AN ABRASIVE, THE LATTER BEING PRESENT IN AN EFFECTIVE AMOUNT OF AT LEAST THREE TIMES AS MUCH, BY WEIGHT, AS THE TOTAL WEIGHT OF BINDER.
Claim 4
Dependent Claim
41 words
A POROUS ABRASIVE ARTICLE COMPRISING A BINDER OF POLYVINYL FORMAL AND A DISPERSED THERMOPLASTIC MATERIAL, AND AN ABRASIVE, THE LATTER BEING PRESENT IN AN EFFECTIVE AMOUNT OF AT LEAST THREE TIMES AS MUCH, BY WEIGHT, AS THE TOTAL WEIGHT OF BINDER.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1968-04-05 | 1968-10-05 | 1969-04-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-04-05 | 1972-10-05 | 1973-04-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-04-05 | 1976-10-05 | 1977-04-06 | $7700.00 | Window Closed / Lapsed |