Patent US2809539A successfully refreshed from Google Patents.
US2809539A
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Method and machine for accurately determining internal diameters
Assignee: Individual
•
Filing: 1955-02-03
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Granted: 1957-10-15
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Expires: 1975-02-03
Abstract
No abstract record available.
Inventors
- 👤 Stephen T Hennessy
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 08:48
CPC Classifications
G; G01; G01B; G01B5/00; G01B5/08; G01B5/12; Y; Y10; Y10S; Y10S408/00; Y10S408/707; Y10T; Y10T279/00; Y10T279/10; Y10T279/1037; Y10T279/1041; Y10T279/1054; Y10T279/1058; Y10T408/00; Y10T408/03; Y10T408/55; Y10T408/553
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) | 1960-10-14 | 1961-04-15 | 1961-10-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-10-14 | 1965-04-15 | 1965-10-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-10-14 | 1969-04-15 | 1969-10-15 | $7700.00 | Window Closed / Lapsed |