US3385345A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of making rapid curing foundry cores
Assignee: Ashland LLC
•
Filing: 1966-03-04
•
Granted: 1968-05-28
•
Expires: 1986-03-04
Abstract
No abstract record available.
Inventors
- 👤 Nick L Miraldi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 09:34
CPC Classifications
B; B22; B22C; B22C1/00; B22C1/16; B22C1/167
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
48 words
IN A FOUNDRY PROCESS WHEREIN CORES ARE PREPARED FROM A FOUNDRY MIX CONTAINING SAND AND A BINDING AMOUNT OF A BINDER COMPOSITION CONTAINING POLYISOCYANATE AND A HYDROXYL-CONTAINING REACTANT, THE IMPROVEMENT WHICH COMPRISES INCLUDING A METAL SILICATE IN SAID FOUNDRY MIX UNDER HYDROUS CONDITIONS AND THEREAFTER PREPARING SAID CORES.
Claim 2
Dependent Claim
48 words
IN A FOUNDRY PROCESS WHEREIN CORES ARE PREPARED FROM A FOUNDRY MIX CONTAINING SAND AND A BINDING AMOUNT OF A BINDER COMPOSITION CONTAINING POLYISOCYANATE AND A HYDROXYL-CONTAINING REACTANT, THE IMPROVEMENT WHICH COMPRISES INCLUDING A METAL SILICATE IN SAID FOUNDRY MIX UNDER HYDROUS CONDITIONS AND THEREAFTER PREPARING SAID CORES.
References Cited (Backward Citations)
US2905563A
Cited
US2952553A
Cited
US3179990A
Cited
US3326701A
Cited
US3349830A
Cited
US3255500A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1971-05-28 | 1971-11-27 | 1972-05-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-05-28 | 1975-11-27 | 1976-05-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-05-28 | 1979-11-27 | 1980-05-28 | $7700.00 | Window Closed / Lapsed |