Patent US644956A successfully refreshed from Google Patents.
Patent US3374825A successfully refreshed from Google Patents.
US3374825A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Core oil compositions containing organic fibers
Assignee: JBS USA LLC
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Filing: 1962-06-21
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Granted: 1968-03-26
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Expires: 1982-06-21
Abstract
No abstract record available.
Inventors
- 👤 Robert J Johnson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 16:49
CPC Classifications
B; B22; B22C; B22C1/00; B22C1/16; B22C1/167
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
80 words
THE METHOD OF CASTING METALS WHICH COMPRISES MIXING A CORE BODY MATEIAL WITH A REFRACTORY MINOR PORTION OF A CORE BINDER COMPRISING: A MIXTURE OF AN ALIPHATIC DICARBONYLIC ANHYDRIDE ADDUCT AND THE POLYMERIC REACTION PRODUCT OF AN OXIRANE-CONTAINING HIGHER FATTY ACID ESTER, AN ALIPHATIC LACTAM, AND A POLYAMINE CURING AGENT, AND AN ADMIXTURE OF ORGANIC FIBERS HJAVING A LENGTH OF AT LEAST ABOUT ONE MILLIMETER, FORMING A MOLD OF THE RESULTING COMPOSITON, AND CASTING THE METAL IN THE RESULTING MOLD.
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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) | 1971-03-26 | 1971-09-25 | 1972-03-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-03-26 | 1975-09-25 | 1976-03-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-03-26 | 1979-09-25 | 1980-03-26 | $7700.00 | Window Closed / Lapsed |