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US2956432A
Expired / Lapsed
US
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Material hardness detector
Assignee: Individual
•
Filing: 1956-07-30
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Granted: 1960-10-18
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Expires: 1976-07-30
Abstract
No abstract record available.
Inventors
- 👤 Florence B Henrikson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 19:48
CPC Classifications
G; G01; G01N; G01N3/00; G01N3/40; G01N3/42
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US499739A
Cited
US1320748A
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US1376413A
Cited
US2009316A
Cited
US2038487A
Cited
US2448486A
Cited
US2645936A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-10-18 | 1964-04-18 | 1964-10-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-10-18 | 1968-04-18 | 1968-10-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-10-18 | 1972-04-18 | 1972-10-18 | $7700.00 | Window Closed / Lapsed |