US2916793A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for making concrete building block
Assignee: Individual
•
Filing: 1954-05-06
•
Granted: 1959-12-15
•
Expires: 1974-05-06
Abstract
No abstract record available.
Inventors
- 👤 Jesse D Ellis
- 👤 Samuel L Wehster
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 14:42
CPC Classifications
B; B28; B28B; B28B23/00; B28B23/02; B28B23/028; B28B15/00; B28B15/005; B28B23/022; E; E05; E05F; E05F1/00; E05F1/08; E05F1/10; E05F1/12; E05F1/123; E05F1/1238; Y; Y10; Y10S; Y10S425/00; Y10S425/033
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1629960A
Cited
US2297923A
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US2250763A
Cited
GB556396A
Cited
US2583597A
Cited
US2692418A
Cited
US2492415A
Cited
US2614308A
Cited
US2566787A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-12-14 | 1963-06-15 | 1963-12-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-12-14 | 1967-06-15 | 1967-12-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-12-14 | 1971-06-15 | 1971-12-15 | $7700.00 | Window Closed / Lapsed |