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US2500494A
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US
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Casting method
Assignee: JEFFERS Manufacturing Co
•
Filing: 1946-05-17
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Granted: 1950-03-14
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Expires: 1966-05-17
Abstract
No abstract record available.
Inventors
- 👤 Dorothy M Jeffers
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 12:56
CPC Classifications
B; B29; B29C; B29C70/00; B29C70/68; A; A01; A01K; A01K85/00; B29C39/00; B29C39/02; B29C39/10; Y; Y10; Y10S; Y10S425/00; Y10S425/249
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US934214A
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US1891088A
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US2248898A
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US2400482A
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US2330330A
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US2341999A
Cited
US2299520A
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US2272704A
Cited
US2378882A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1953-03-13 | 1953-09-12 | 1954-03-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-03-13 | 1957-09-12 | 1958-03-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-03-13 | 1961-09-12 | 1962-03-14 | $7700.00 | Window Closed / Lapsed |