Patent US2874428A successfully refreshed from Google Patents.
US2874428A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of hardening of sand cores and the like
Assignee: Bonney Floyd Co
•
Filing: 1956-03-01
•
Granted: 1959-02-24
•
Expires: 1976-03-01
Abstract
No abstract record available.
Inventors
- 👤 Jr John L V Bonney
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 10:41
CPC Classifications
B; B22; B22C; B22C9/00; B22C9/12; B22C9/123; B22C1/00; B22C1/16; B22C1/162
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
80 words
THE METHOD OF FORMING SHAPED, COMPACTED SAND ARTICLES OF SUBSTANTIAL COMPRESSION STRENGTH WHICH COMPRISES THE STEPS OF (1) MIXING CLEAN, SUBSTANIALLY DRY SAND WITH AN AQUEOUS SOLUTION COMPRISING ESSENTIALLY AN INORGANIC SILICATE WHICH AFFORDS SIO2 IN SUCH SOLUTION (2) SHAPING THE SO-TREATED SAND INTO A DESIRED FORM, (3) REMOVING SUBSTANTIALLY THE AIR ENTRAPPED IN THE INTERSTICES OF THE SHAPED SAND FORM, AND (4) CONTACTING THE SUBSTANTIALLY AIR-FREE SAND FORM WITH CARBON DIOXIDE WHEREBY A REACTION IS EFFECTED WITH SAID SIO2.
Claim 2
Independent Claim
80 words
THE METHOD OF FORMING SHAPED, COMPACTED SAND ARTICLES OF SUBSTANTIAL COMPRESSION STRENGTH WHICH COMPRISES THE STEPS OF (1) MIXING CLEAN, SUBSTANIALLY DRY SAND WITH AN AQUEOUS SOLUTION COMPRISING ESSENTIALLY AN INORGANIC SILICATE WHICH AFFORDS SIO2 IN SUCH SOLUTION (2) SHAPING THE SO-TREATED SAND INTO A DESIRED FORM, (3) REMOVING SUBSTANTIALLY THE AIR ENTRAPPED IN THE INTERSTICES OF THE SHAPED SAND FORM, AND (4) CONTACTING THE SUBSTANTIALLY AIR-FREE SAND FORM WITH CARBON DIOXIDE WHEREBY A REACTION IS EFFECTED WITH SAID SIO2.
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) | 1962-02-23 | 1962-08-25 | 1963-02-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-02-23 | 1966-08-25 | 1967-02-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-02-23 | 1970-08-25 | 1971-02-24 | $7700.00 | Window Closed / Lapsed |