Patent US2554740A successfully refreshed from Google Patents.
US2554740A
Expired / Lapsed
US
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Grinding machine
Assignee: Coventry Gauge and Tool Co Ltd
•
Filing: 1949-08-17
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Granted: 1951-05-29
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Expires: 1969-08-17
Abstract
No abstract record available.
Inventors
- 👤 Jellis Morgan
- 👤 Darby Walter
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 15:05
CPC Classifications
F; F16; F16D; F16D23/00; F16D23/02; F16D23/04; B; B23; B23F; B23F23/00; B23F23/12; B23F23/1293; B23F5/00; B23F5/02; B23F5/04
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2307238A
Cited
US2385650A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1954-05-28 | 1954-11-27 | 1955-05-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-05-28 | 1958-11-27 | 1959-05-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-05-28 | 1962-11-27 | 1963-05-29 | $7700.00 | Window Closed / Lapsed |