US4083891A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Novolak-ABS binder for a grinding wheel
Assignee: SI Group Inc
•
Filing: 1975-03-28
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Granted: 1978-04-11
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Expires: 1995-03-28
Abstract
Abstract An acrylonitrile-butadiene-styrene terpolymer is added to a phenol formaldehyde novolak to form a grinding wheel binder imparting increased flexural strength to the grinding wheel.
Inventors
- 👤 Lewis H. Bowers
- 👤 Raymond E. Jankowski
- 👤 John L. Sullivan
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 15:20
CPC Classifications
B; B24; B24D; B24D3/00; B24D3/02; B24D3/20; B24D3/28; B24D3/285; C; C08; C08L; C08L61/00; C08L61/04; C08L61/06
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
52 words
A process of preparing a composition suitable for bonding abrasive grits comprising forming a novolak from phenol and formaldehyde in the presence of an acid catalyst and adding an acrylonitrile-butadiene-styrene terpolymer resin in an amount of 1 to 30% of the phenol prior to the completion of the formation of the novolak.
Claim 2
Dependent Claim
52 words
A process of preparing a composition suitable for bonding abrasive grits comprising forming a novolak from phenol and formaldehyde in the presence of an acid catalyst and adding an acrylonitrile-butadiene-styrene terpolymer resin in an amount of 1 to 30% of the phenol prior to the completion of the formation of the novolak.
Claim 3
Dependent Claim
38 words
A process according to claim 1 including the step of adding a hardening agent for the novolak after formation of the novolak, said hardening agent being present in an amount sufficient to harden the novolak upon subsequent heating.
Claim 4
Dependent Claim
9 words
The product prepared by the process of claim 2.
Claim 5
Dependent Claim
9 words
The product prepared by the process of claim 1.
Claim 6
Dependent Claim
30 words
A process according to claim 1 wherein there is added 5 to 20% of ABS resin based on the phenol prior to the completion of the formulation of the novolak.
Claim 7
Dependent Claim
9 words
The product prepared by the process of claim 5.
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) | 1981-04-10 | 1981-10-10 | 1982-04-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-04-10 | 1985-10-10 | 1986-04-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-04-10 | 1989-10-10 | 1990-04-11 | $7700.00 | Window Closed / Lapsed |