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US2456079A
Expired / Lapsed
US
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Surface grinder
Assignee: Individual
•
Filing: 1945-11-19
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Granted: 1948-12-14
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Expires: 1965-11-19
Abstract
No abstract record available.
Inventors
- 👤 John W Parker
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 05:45
CPC Classifications
B; B23; B23Q; B23Q1/00; B23Q1/25; B23Q1/26; B23Q1/28; B24; B24B; B24B41/00; B24B41/02
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1951-12-14 | 1952-06-14 | 1952-12-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1955-12-14 | 1956-06-14 | 1956-12-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1959-12-14 | 1960-06-14 | 1960-12-14 | $7700.00 | Window Closed / Lapsed |