Patent CH176884A successfully refreshed from Google Patents.
US3263286A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process and material for precision investment casting
Assignee: Precision Metalsmiths Inc
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Filing: 1965-04-26
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Granted: 1966-08-02
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Expires: 1985-04-26
Abstract
No abstract record available.
Inventors
- 👤 Claude H Watts
- 👤 Daskivich Michael
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 09:27
CPC Classifications
C; C08; C08L; C08L31/00; C08L31/02; C08L31/04; B; B22; B22C; B22C7/00; B22C7/02; B22C9/00; B22C9/02; B22C9/04; C08L91/00; C08L91/06; C08L91/08
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
124 words
A MOLDED WORKPIECE PATTERN FOR FORMING A CASTING MOLD COMPRISING FROM ABOUT 30% TO ABOUT 50% BY WEIGHT OF A MODIFIED PLANE WOOD ROSIN, FROM ABOUT 5% TO ABOUT 15% BY WEIGHT OF A HIGH MOLECULAR WEIGHT ETHYLENE VINYL ACETATE COPOLYMER, AND FROM ABOUT 25% TO ABOUT 50% BY WEIGHT OF BLENDED WAXES, SAID PATTERN BEING FREE OF SOLVENTS AND HAVING THE FOREGOING INGREDIENTS BLENDED WHILE MOLTEN AND SUBSTANTIALLY UNIFORMLY DISTRIBUTED THROUGHOUT THE PATTERN AT ROOM TEMPERATURE, AND SAID PATTERN BEING FURTHER CHARACTERIZED BY A SOFTENING POINT IN THE RANGE OF FROM ABOUT 210*F. TO ABOUT 220* F. AND BY SUBSTANTIALLY IMMEDIATE SURFACE MELTING TO A LOW VISOCITY LIQUID WHEN SUBJECTED TO A TEMPERATURE IN THE RANGE OF FROM ABOUT 1600*F. TO ABOUT 2300*F.
Claim 2
Dependent Claim
124 words
A MOLDED WORKPIECE PATTERN FOR FORMING A CASTING MOLD COMPRISING FROM ABOUT 30% TO ABOUT 50% BY WEIGHT OF A MODIFIED PLANE WOOD ROSIN, FROM ABOUT 5% TO ABOUT 15% BY WEIGHT OF A HIGH MOLECULAR WEIGHT ETHYLENE VINYL ACETATE COPOLYMER, AND FROM ABOUT 25% TO ABOUT 50% BY WEIGHT OF BLENDED WAXES, SAID PATTERN BEING FREE OF SOLVENTS AND HAVING THE FOREGOING INGREDIENTS BLENDED WHILE MOLTEN AND SUBSTANTIALLY UNIFORMLY DISTRIBUTED THROUGHOUT THE PATTERN AT ROOM TEMPERATURE, AND SAID PATTERN BEING FURTHER CHARACTERIZED BY A SOFTENING POINT IN THE RANGE OF FROM ABOUT 210*F. TO ABOUT 220* F. AND BY SUBSTANTIALLY IMMEDIATE SURFACE MELTING TO A LOW VISOCITY LIQUID WHEN SUBJECTED TO A TEMPERATURE IN THE RANGE OF FROM ABOUT 1600*F. TO ABOUT 2300*F.
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) | 1969-08-01 | 1970-01-31 | 1970-08-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-08-01 | 1974-01-31 | 1974-08-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-08-01 | 1978-01-31 | 1978-08-02 | $7700.00 | Window Closed / Lapsed |