US2650411A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Mold for head wall construction
Assignee: Individual
•
Filing: 1950-12-05
•
Granted: 1953-09-01
•
Expires: 1970-12-05
Abstract
No abstract record available.
Inventors
- 👤 William E Mitchell
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 00:42
CPC Classifications
E; E01; E01C; E01C11/00; E01C11/22; E01C11/224; B; B28; B28B; B28B7/00; B28B7/16; B28B7/168
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1014360A
Cited
US1049436A
Cited
US1331096A
Cited
US1597675A
Cited
US1926633A
Cited
US1948931A
Cited
US2021210A
Cited
US2464705A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1956-08-31 | 1957-03-02 | 1957-09-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-08-31 | 1961-03-02 | 1961-09-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-08-31 | 1965-03-02 | 1965-09-01 | $7700.00 | Window Closed / Lapsed |