US2950871A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Crusher construction
Assignee: Frog Switch & Manufacturing Co
•
Filing: 1956-05-23
•
Granted: 1960-08-30
•
Expires: 1976-05-23
Abstract
No abstract record available.
Inventors
- 👤 Forrest E Smith
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 00:34
CPC Classifications
B; B02; B02C; B02C1/00; B02C1/02; B02C1/10; Y; Y10; Y10S; Y10S100/00; Y10S100/902
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US187414A
Cited
US343268A
Cited
US947737A
Cited
US1029910A
Cited
FR588108A
Cited
US2122033A
Cited
US2532678A
Cited
US2609154A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-08-30 | 1964-02-29 | 1964-08-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-08-30 | 1968-02-29 | 1968-08-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-08-30 | 1972-02-29 | 1972-08-30 | $7700.00 | Window Closed / Lapsed |