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US2822686A
Expired / Lapsed
US
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Wear and abrasion testing machine
Assignee: Individual
•
Filing: 1955-01-21
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Granted: 1958-02-11
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Expires: 1975-01-21
Abstract
No abstract record available.
Inventors
- 👤 Campana Charles Ralph
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 22:24
CPC Classifications
G; G01; G01N; G01N3/00; G01N3/56
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1108928A
Cited
US1478335A
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US1483662A
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US2032202A
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US2079591A
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US2660055A
Cited
US2721473A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-02-10 | 1961-08-12 | 1962-02-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-02-10 | 1965-08-12 | 1966-02-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-02-10 | 1969-08-12 | 1970-02-11 | $7700.00 | Window Closed / Lapsed |