Patent US2638659A successfully refreshed from Google Patents.
US2638659A
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US
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Rail clamp for machine tools
Assignee: GA Gray Co
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Filing: 1948-09-29
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Granted: 1953-05-19
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Expires: 1968-09-29
Abstract
No abstract record available.
Inventors
- 👤 John M Walter
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 07:14
CPC Classifications
B; B23; B23Q; B23Q1/00; B23Q1/25; B23Q1/26; B23Q1/28; Y; Y10; Y10T; Y10T409/00; Y10T409/30; Y10T409/50; Y10T409/504756; Y10T409/505412; Y10T409/506068
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) | 1956-05-18 | 1956-11-17 | 1957-05-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-05-18 | 1960-11-17 | 1961-05-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-05-18 | 1964-11-17 | 1965-05-19 | $7700.00 | Window Closed / Lapsed |