US3339620A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Cavityless casting pattern and method of making same
Assignee: Full Mold Process Inc
•
Filing: 1964-12-21
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Granted: 1967-09-05
•
Expires: 1984-12-21
Abstract
No abstract record available.
Inventors
- 👤 Erich M Krzyzanowski
- 👤 Schweikert Heinz
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 05:34
CPC Classifications
B; B22; B22C; B22C7/00; B22C7/02; B22C7/023; Y; Y10; Y10T; Y10T428/00; Y10T428/249921; Y10T428/249953; Y10T428/249987
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
85 words
A PATTERN SUITABLE FOR USE IN A CAVITYLESS CASTING PROCESS WHICH COMPRISES A BASE MADE OF EXPANDED PLASTIC GRANULES WHICH ARE GASIFIABLE AT THE ELEVATED TEMPERATURE OF AMOLTTEN CASTING CHARGE, SAID BASE HAVING SMALL GAPS IN ITS OUTER SURFACES AND A WAX-LIKE COMPOSITION PLACED ONLY IN SAID GAPS ON THE SURFACES OF THE PATTERN TO PROVIDE IN CONJUNCTION WITH THE EXPOSED PATTERN SURFACE-DEFINING SURFACES OF THE GRANULES A SMOOTH OUTER SURFACE ON THE PATTERN AND SUBSTANTIALLY NONE OF SAID COMPOSITION BEING ON SAID EXPOSED SURFACES.
Claim 2
Dependent Claim
85 words
A PATTERN SUITABLE FOR USE IN A CAVITYLESS CASTING PROCESS WHICH COMPRISES A BASE MADE OF EXPANDED PLASTIC GRANULES WHICH ARE GASIFIABLE AT THE ELEVATED TEMPERATURE OF AMOLTTEN CASTING CHARGE, SAID BASE HAVING SMALL GAPS IN ITS OUTER SURFACES AND A WAX-LIKE COMPOSITION PLACED ONLY IN SAID GAPS ON THE SURFACES OF THE PATTERN TO PROVIDE IN CONJUNCTION WITH THE EXPOSED PATTERN SURFACE-DEFINING SURFACES OF THE GRANULES A SMOOTH OUTER SURFACE ON THE PATTERN AND SUBSTANTIALLY NONE OF SAID COMPOSITION BEING ON SAID EXPOSED SURFACES.
References Cited (Backward Citations)
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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) | 1970-09-04 | 1971-03-06 | 1971-09-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-09-04 | 1975-03-06 | 1975-09-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-09-04 | 1979-03-06 | 1979-09-05 | $7700.00 | Window Closed / Lapsed |