US3755229A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Foundry core compositions
Assignee: Unilever Bestfoods North America
•
Filing: 1971-07-20
•
Granted: 1973-08-28
•
Expires: 1991-07-20
Abstract
Abstract A foundry core composition comprising sand and a binder comprising phenolic resole resin, furfuryl alcohol and a catalyst selected from the group consisting of stannic chloride and stannous chloride.
Inventors
- 👤 C Johnson
- 👤 R Laitar
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 21:47
CPC Classifications
C; C08; C08K; C08K3/00; C08K3/16
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
21 words
The foundry core composition of claim 1 wherein the phenolic resole vesin has a water dilutability of at least 100 percent.
Claim 2
Dependent Claim
14 words
The foundry core composition of claim 2 wherein the catalyst component is stannic chloride.
Claim 3
Dependent Claim
18 words
The foundry core composition of claim 3 having from about 1 to 10 parts, by weight, stannic chloride.
Claim 4
Dependent Claim
23 words
The foundry core composition of claim 4 wherein the ratio of furfuryl alcohol to phenolic resole resin is from about 0.1:1 to 0.8:1.
References Cited (Backward Citations)
US2915492A
Cited
US3008205A
Cited
US3057026A
Cited
US3184814A
Cited
US3408327A
Cited
US3513223A
Cited
US3549584A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-08-27 | 1977-02-26 | 1977-08-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-08-27 | 1981-02-26 | 1981-08-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-08-27 | 1985-02-26 | 1985-08-28 | $7700.00 | Window Closed / Lapsed |