US2847737A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Casting method
Assignee: Individual
•
Filing: 1955-05-02
•
Granted: 1958-08-19
•
Expires: 1975-05-02
Abstract
No abstract record available.
Inventors
- 👤 Joseph B Brennan
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 21:35
CPC Classifications
B; B22; B22D; B22D11/00; B22D11/06; B22D11/0602
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US223077A
Cited
US1948505A
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DE711133C
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US2348178A
Cited
US2301902A
Cited
US2433903A
Cited
DE844806C
Cited
US2714235A
Cited
US2664605A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-08-18 | 1962-02-17 | 1962-08-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-08-18 | 1966-02-17 | 1966-08-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-08-18 | 1970-02-17 | 1970-08-19 | $7700.00 | Window Closed / Lapsed |