US2787093A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Grinding apparatus
Assignee: Individual
•
Filing: 1954-03-08
•
Granted: 1957-04-02
•
Expires: 1974-03-08
Abstract
No abstract record available.
Inventors
- 👤 Ray W Sundberg
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 12:24
CPC Classifications
B; B24; B24B; B24B11/00; B24B11/02; B24B11/04; B24B11/10
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1042794A
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US1072868A
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US1550712A
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DE470256C
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US1767091A
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US1994975A
Cited
US2008276A
Cited
US2398556A
Cited
US2456061A
Cited
US2479898A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1960-04-01 | 1960-10-01 | 1961-04-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-04-01 | 1964-10-01 | 1965-04-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-04-01 | 1968-10-01 | 1969-04-02 | $7700.00 | Window Closed / Lapsed |