US2748435A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for reinforcing shell molds
Assignee: Motors Liquidation Co
•
Filing: 1951-11-14
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Granted: 1956-06-05
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Expires: 1971-11-14
Abstract
No abstract record available.
Inventors
- 👤 William S Hackett
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 01:45
CPC Classifications
B; B22; B22C; B22C23/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
95 words
A PROCESS FOR FORMING A REINFORCED SHELL MOLD ASSEMBLY FOR CASTING METAL, SAID PROCESS COMPRISING PLACING A MIXTURE OF A MAJOR PROPORTION OF SAND AND A MINOR PROPORTION OF THERMOSETTING RESIN IN CONTACT WITH A HOT METALLIC PATTERN FOR A PERIOD OF TIME SUFFICIENT TO MELT THE RESIN AND TO BOND A SUBSTANTIAL PORTION OF THE SAND PARTICLES TOGETHER, REMOVING ANY EXCESS SAND AND RESIN, SUBSEQUENTLY CURING THE FORMED MOLD SHELL BY BAKING FOR A SHORT PERIOD OF TIME WHILE IN CONTACT WITH THE PATTERN, STRIPPING THE MOLD SHELL FROM THE PATTERN, APPLYING TO THE
Claim 2
Dependent Claim
95 words
A PROCESS FOR FORMING A REINFORCED SHELL MOLD ASSEMBLY FOR CASTING METAL, SAID PROCESS COMPRISING PLACING A MIXTURE OF A MAJOR PROPORTION OF SAND AND A MINOR PROPORTION OF THERMOSETTING RESIN IN CONTACT WITH A HOT METALLIC PATTERN FOR A PERIOD OF TIME SUFFICIENT TO MELT THE RESIN AND TO BOND A SUBSTANTIAL PORTION OF THE SAND PARTICLES TOGETHER, REMOVING ANY EXCESS SAND AND RESIN, SUBSEQUENTLY CURING THE FORMED MOLD SHELL BY BAKING FOR A SHORT PERIOD OF TIME WHILE IN CONTACT WITH THE PATTERN, STRIPPING THE MOLD SHELL FROM THE PATTERN, APPLYING TO THE
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1959-06-05 | 1959-12-05 | 1960-06-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-06-05 | 1963-12-05 | 1964-06-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-06-05 | 1967-12-05 | 1968-06-05 | $7700.00 | Window Closed / Lapsed |