US2638676A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Shaft alignment device
Assignee: Individual
•
Filing: 1949-04-21
•
Granted: 1953-05-19
•
Expires: 1969-04-21
Abstract
No abstract record available.
Inventors
- 👤 John E Callahan
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 02:37
CPC Classifications
B; B25; B25D; B25D5/00; B25D5/02; Y; Y10; Y10T; Y10T29/00; Y10T29/53; Y10T29/53909; Y10T29/53913
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US431054A
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US2451720A
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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 |