US2640591A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Automatic handling and hardness testing mechanism
Assignee: Eaton Corp
•
Filing: 1950-01-10
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Granted: 1953-06-02
•
Expires: 1970-01-10
Abstract
No abstract record available.
Inventors
- 👤 Richard L Sieggreen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 19:26
CPC Classifications
G; G01; G01N; G01N3/00; G01N3/40; G01N3/42; Y; Y10; Y10S; Y10S209/00; Y10S209/924
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1133273A
Cited
US1652298A
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US1762497A
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US1885972A
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US2338868A
Cited
US2368796A
Cited
US2523555A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1956-06-01 | 1956-12-01 | 1957-06-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-06-01 | 1960-12-01 | 1961-06-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-06-01 | 1964-12-01 | 1965-06-02 | $7700.00 | Window Closed / Lapsed |