US3229338A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Manufacturing process for re-usable molds
Assignee: Individual
•
Filing: 1965-03-31
•
Granted: 1966-01-18
•
Expires: 1985-03-31
Abstract
No abstract record available.
Inventors
- 👤 Kopera Joseph
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 20:19
CPC Classifications
B; B22; B22C; B22C9/00; B22C9/06
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
75 words
A METHOD OF PREPARING A RE-USABLE MOLD INCLUDING THE STEPS OF PLACING A PATTERN IN A FLASK AND COVERING SAID PATTERN WITH WAX PAPER; FILLING THE FLASK WITH A MOIST MIXTURE OF COAL ASH, FIRE CLAY AND MILK AND COMPACTING THE MIXTURE UNDER HIGH PRESSURE; COVERING ALL SURFACES OF THE COMPACTED MIXTURE, NOT COVERED BY THE FLASK AND PATTERN, WITH ALUMINUM FOIL AND THEN BAKING SAID MOLD UNTIL THE MIXTURE FORMS A HARD, POROUS MASS.
Claim 2
Independent Claim
75 words
A METHOD OF PREPARING A RE-USABLE MOLD INCLUDING THE STEPS OF PLACING A PATTERN IN A FLASK AND COVERING SAID PATTERN WITH WAX PAPER; FILLING THE FLASK WITH A MOIST MIXTURE OF COAL ASH, FIRE CLAY AND MILK AND COMPACTING THE MIXTURE UNDER HIGH PRESSURE; COVERING ALL SURFACES OF THE COMPACTED MIXTURE, NOT COVERED BY THE FLASK AND PATTERN, WITH ALUMINUM FOIL AND THEN BAKING SAID MOLD UNTIL THE MIXTURE FORMS A HARD, POROUS MASS.
References Cited (Backward Citations)
US85340A
Cited
US813605A
Cited
US1521719A
Cited
US1511504A
Cited
US1984905A
Cited
US2056048A
Cited
US2306516A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-01-17 | 1969-07-19 | 1970-01-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-01-17 | 1973-07-19 | 1974-01-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-01-17 | 1977-07-19 | 1978-01-18 | $7700.00 | Window Closed / Lapsed |