US2921750A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Stonebreaking machines
Assignee: Individual
•
Filing: 1953-11-18
•
Granted: 1960-01-19
•
Expires: 1973-11-18
Abstract
No abstract record available.
Inventors
- 👤 Picalarga Marcello
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 08:36
CPC Classifications
B; B02; B02C; B02C1/00; B02C1/02; B02C1/04
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US286223A
Cited
DE100391C
Cited
US137939A
Cited
US140019A
Cited
US158800A
Cited
US223281A
Cited
US315469A
Cited
US1849935A
Cited
US46461A
Cited
US380121A
Cited
US304537A
Cited
GB189910041A
Cited
US885717A
Cited
US1158259A
Cited
AT66673B
Cited
US2028643A
Cited
US1901159A
Cited
FR740081A
Cited
FR43545E
Cited
US2094465A
Cited
US2122033A
Cited
US2314414A
Cited
US2605051A
Cited
US2593353A
Cited
US2751158A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-01-18 | 1963-07-20 | 1964-01-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-01-18 | 1967-07-20 | 1968-01-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-01-18 | 1971-07-20 | 1972-01-19 | $7700.00 | Window Closed / Lapsed |