US2834202A
Expired / Lapsed
US
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Apparatus for measuring hardness
Assignee: General Electric Co
•
Filing: 1955-06-27
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Granted: 1958-05-13
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Expires: 1975-06-27
Abstract
No abstract record available.
Inventors
- 👤 Ellsworth D Cook
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 11:51
CPC Classifications
G; G01; G01N; G01N3/00; G01N3/40; G01N3/42; G01N2203/00; G01N2203/02; G01N2203/06; G01N2203/0617; G01N2203/0623
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2734736A
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US1982026A
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DE750779C
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US2441283A
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US2619831A
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US2569987A
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US2554206A
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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) | 1961-05-12 | 1961-11-11 | 1962-05-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-05-12 | 1965-11-11 | 1966-05-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-05-12 | 1969-11-11 | 1970-05-13 | $7700.00 | Window Closed / Lapsed |