Patent US2571161A successfully refreshed from Google Patents.
US2571161A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Automatic recording tube calipers for inside measurements within cylinders
Assignee: Individual
•
Filing: 1946-02-23
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Granted: 1951-10-16
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Expires: 1966-02-23
Abstract
No abstract record available.
Inventors
- 👤 Foster M Poole
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 18:53
CPC Classifications
G; G01; G01B; G01B7/00; G01B7/30; G01B7/12; G01B7/13
Claims Analysis
Total Claims: 0
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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) | 1954-10-15 | 1955-04-16 | 1955-10-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-10-15 | 1959-04-16 | 1959-10-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-10-15 | 1963-04-16 | 1963-10-16 | $7700.00 | Window Closed / Lapsed |