Patent US2771650A successfully refreshed from Google Patents.
US2771650A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Shell molding
Assignee: Motors Liquidation Co
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Filing: 1952-02-04
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Granted: 1956-11-27
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Expires: 1972-02-04
Abstract
No abstract record available.
Inventors
- 👤 Philip R White
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 17:25
CPC Classifications
B; B22; B22C; B22C23/00; Y; Y10; Y10T; Y10T428/00; Y10T428/31504; Y10T428/31678; Y10T428/31714
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
56 words
THE METHOD OF MAKING A MOLD CONSISTING ESSENTIALLY OF NONMETALLIC REFRACTORY MATERIAL AND A HEAT HARDENABLE BINDER WHICH COMPRISES APPLYING A MIXTURE OF SAID NONMETALLIC REFRACTORY MATERIAL AND HEAR HARDENABLE BINDER TO A HEATED ALUMINUM PATTERN HAVING AN ANODIZED SURFACE LAYER OF ABOUT .0001 TO .0002 INCH IN THICKNESS AND CARNAUBA WAX ON SAID ANODIZED LAYER.
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) | 1959-11-27 | 1960-05-28 | 1960-11-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-11-27 | 1964-05-28 | 1964-11-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-11-27 | 1968-05-28 | 1968-11-27 | $7700.00 | Window Closed / Lapsed |