Patent US2948935A successfully refreshed from Google Patents.
US2948935A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process of making refractory shell for casting metal
Assignee: Individual
•
Filing: 1958-04-07
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Granted: 1960-08-16
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Expires: 1978-04-07
Abstract
No abstract record available.
Inventors
- 👤 Richard T Carter
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 12:58
CPC Classifications
B; B22; B22C; B22C1/00; B22C1/16; B22C1/165; B22C9/00; B22C9/02; B22C9/04; B28; B28B; B28B1/00; B28B1/30; B28B7/00; B28B7/34; B28B7/342
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1959179A
Cited
US2322667A
Cited
US2521614A
Cited
US2815552A
Cited
US2806270A
Cited
GB770527A
Cited
US2790219A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-08-16 | 1964-02-15 | 1964-08-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-08-16 | 1968-02-15 | 1968-08-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-08-16 | 1972-02-15 | 1972-08-16 | $7700.00 | Window Closed / Lapsed |