US2553987A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Gyratory crusher
Assignee: Library and Archives Canada
•
Filing: 1946-11-29
•
Granted: 1951-05-22
•
Expires: 1966-11-29
Abstract
No abstract record available.
Inventors
- 👤 Robert W Stevens
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 05:16
CPC Classifications
B; B02; B02C; B02C2/00; B02C2/02; B02C2/04; B02C2/045
Claims Analysis
Total Claims: 0
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USRE19538E
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1954-05-21 | 1954-11-20 | 1955-05-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-05-21 | 1958-11-20 | 1959-05-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-05-21 | 1962-11-20 | 1963-05-22 | $7700.00 | Window Closed / Lapsed |