US2923041A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Mold release agents for use in die casting
Assignee: ChampionX LLC
•
Filing: 1956-06-18
•
Granted: 1960-02-02
•
Expires: 1976-06-18
Abstract
No abstract record available.
Inventors
- 👤 John W Ryznar
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 21:13
CPC Classifications
B; B22; B22C; B22C3/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
52 words
THE METHOD OF CASTING A NON-FERROUS METAL WHICH COMPRISES COATING THE METAL FACE SURFACES OF A METAL MOLD WITH A UNIFORM THIN COATING OF A HYDROCARBON POLYMER OF AN UNSUBSTITUTED, MONOOLEFINIC ALIPHATIC MONOMER, SAID POLYMER HAVING AN AVERAGE MOLECULAR WEIGHT NOT GREATER THAN 5000, AND CASTING SAID METAL IN SAID COATED MOLD.
Claim 2
Independent Claim
52 words
THE METHOD OF CASTING A NON-FERROUS METAL WHICH COMPRISES COATING THE METAL FACE SURFACES OF A METAL MOLD WITH A UNIFORM THIN COATING OF A HYDROCARBON POLYMER OF AN UNSUBSTITUTED, MONOOLEFINIC ALIPHATIC MONOMER, SAID POLYMER HAVING AN AVERAGE MOLECULAR WEIGHT NOT GREATER THAN 5000, AND CASTING SAID METAL IN SAID COATED MOLD.
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Cited
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Cited
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Cited
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Cited
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Cited
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Cited
US2695246A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-02-01 | 1963-08-03 | 1964-02-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-02-01 | 1967-08-03 | 1968-02-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-02-01 | 1971-08-03 | 1972-02-02 | $7700.00 | Window Closed / Lapsed |