US1396016A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Rock-crusher
Assignee: Frog Switch & Manufacturing Co
•
Filing: 1919-05-22
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Granted: 1921-11-08
•
Expires: 1939-05-22
Abstract
No abstract record available.
Inventors
- 👤 James F Betchkaw
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 12:10
CPC Classifications
B; B02; B02C; B02C2/00; B02C2/005; Y; Y10; Y10T; Y10T403/00; Y10T403/47; Y10T403/471; Y10T403/70; Y10T403/7047
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1924-11-07 | 1925-05-09 | 1925-11-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1928-11-07 | 1929-05-09 | 1929-11-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1932-11-07 | 1933-05-09 | 1933-11-08 | $7700.00 | Window Closed / Lapsed |