US4317896A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Foundry no-bake combination resin binder
Assignee: Delta Resins and Refractories Inc
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Filing: 1980-12-10
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Granted: 1982-03-02
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Expires: 2000-12-10
Abstract
Abstract A binder for foundry aggregate capable of being catalytically cured with a polyisocyanate and an alkaline catalyst comprising in combination, as a major portion, a butylated phenol-formaldehyde resin, a lesser amount of a resole resin and a still lesser amount of a novolac resin.
Inventors
- 👤 Melville J. Holik
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 02:09
CPC Classifications
C; C08; C08L; C08L61/00; C08L61/04; C08L61/06; B; B22; B22C; B22C1/00; B22C1/16; B22C1/20; B22C1/22; B22C1/2233; B22C1/2273; C08G; C08G18/00; C08G18/06; C08G18/28; C08G18/40; C08G18/54; C08G18/542; C08L61/14
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
44 words
A binder for foundry aggregate capable of being catalytically cured with a polyisocyanate and an alkaline catalyst comprising in combination as a major portion a butylated phenolformaldehyde resin, a lesser amount of a resole resin and a still lesser amount of a novolac resin.
Claim 2
Dependent Claim
44 words
A binder for foundry aggregate capable of being catalytically cured with a polyisocyanate and an alkaline catalyst comprising in combination as a major portion a butylated phenolformaldehyde resin, a lesser amount of a resole resin and a still lesser amount of a novolac resin.
Claim 3
Dependent Claim
37 words
The binder in claim 1 wherein the resole resin is present in an amount of about two-thirds that of the butylated resin and the novolac is present in an amount about half that of the butylated resin.
Claim 4
Dependent Claim
20 words
The binder of claim 1 wherein the novolac is prepared from formaldehyde and phenol in a mole ratio of 0.65.
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) | 1985-03-01 | 1985-08-31 | 1986-03-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1989-03-01 | 1989-08-31 | 1990-03-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1993-03-01 | 1993-08-31 | 1994-03-02 | $7700.00 | Window Closed / Lapsed |