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US2689408A
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Assignee: Individual
•
Filing: 1950-10-09
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Granted: 1954-09-21
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Expires: 1970-10-09
Abstract
No abstract record available.
Inventors
- 👤 Roy C Cornell
- 👤 Jack E Dean
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 02:48
CPC Classifications
G; G01; G01B; G01B3/00; G01B3/22; G01B3/28
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US379423A
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US763076A
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US716279A
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US1235785A
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US1455973A
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US2024021A
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US2400371A
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CH248521A
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US2619727A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1957-09-20 | 1958-03-22 | 1958-09-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-09-20 | 1962-03-22 | 1962-09-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-09-20 | 1966-03-22 | 1966-09-21 | $7700.00 | Window Closed / Lapsed |