Patent US2556439A successfully refreshed from Google Patents.
Patent US2807071A successfully refreshed from Google Patents.
US2807071A
Expired / Lapsed
US
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Apparatus for casting
Assignee: THOMAS STEEL FORMS Inc
•
Filing: 1952-01-17
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Granted: 1957-09-24
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Expires: 1972-01-17
Abstract
No abstract record available.
Inventors
- 👤 Gerald T Francis
- 👤 Jr John G Francis
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 21:23
CPC Classifications
B; B28; B28B; B28B7/00; B28B7/0029; B28B7/0035; B28B7/16; B28B7/168; B28B7/22
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US950724A
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US1013251A
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US1007452A
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US1087007A
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US1090488A
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US1123586A
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US1363651A
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US1458145A
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US1556869A
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US2578310A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1960-09-23 | 1961-03-25 | 1961-09-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-09-23 | 1965-03-25 | 1965-09-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-09-23 | 1969-03-25 | 1969-09-24 | $7700.00 | Window Closed / Lapsed |