US2981487A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Grinding apparatus
Assignee: Individual
•
Filing: 1959-01-12
•
Granted: 1961-04-25
•
Expires: 1979-01-12
Abstract
No abstract record available.
Inventors
- 👤 James F Davis
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 06:01
CPC Classifications
A; A47; A47J; A47J42/00; A47J42/32; A47J42/36
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US214195A
Cited
US218953A
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US490163A
Cited
US606174A
Cited
US821448A
Cited
US2208040A
Cited
US2264049A
Cited
US2297604A
Cited
FR969861A
Cited
FR58729E
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-04-24 | 1964-10-24 | 1965-04-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-04-24 | 1968-10-24 | 1969-04-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-04-24 | 1972-10-24 | 1973-04-25 | $7700.00 | Window Closed / Lapsed |