US1520000A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Safety device for conveyer mechanisms
Assignee: Joseph Baker Sons & Perkins Co
•
Filing: 1920-11-12
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Granted: 1924-12-23
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Expires: 1940-11-12
Abstract
No abstract record available.
Inventors
- 👤 Baker Robert Elmer
- 👤 Cummins Arthur Francis
- 👤 Ford Eardley Harry
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 11:17
CPC Classifications
A; A21; A21C; A21C9/00; A21C9/08; Y; Y10; Y10S; Y10S200/00; Y10S200/22
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) | 1927-12-23 | 1928-06-23 | 1928-12-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1931-12-23 | 1932-06-23 | 1932-12-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1935-12-23 | 1936-06-23 | 1936-12-23 | $7700.00 | Window Closed / Lapsed |