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US1663257A
Expired / Lapsed
US
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Grading machine
Assignee: Individual
•
Filing: 1926-08-31
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Granted: 1928-03-20
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Expires: 1946-08-31
Abstract
No abstract record available.
Inventors
- 👤 Roderick A Mackenzie
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 18:05
CPC Classifications
B; B07; B07B; B07B13/00
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) | 1931-03-20 | 1931-09-19 | 1932-03-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1935-03-20 | 1935-09-19 | 1936-03-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1939-03-20 | 1939-09-19 | 1940-03-20 | $7700.00 | Window Closed / Lapsed |